3. WebHome. Posted 6 years ago. in this group like to do. Write sodium sulfate Out-of-date nomenclature used the suffixes ic and ous to designate metals with higher and lower charges, respectively: Iron(III) chloride, FeCl3, was previously called ferric chloride, and iron(II) chloride, FeCl2, was known as ferrous chloride. Figure \(\PageIndex{2}\): Some elements exhibit a regular pattern of ionic charge when they form ions. We reviewed their content and use your feedback to keep the quality high. If we look at the ionic compound consisting of lithium ions and bromide ions, we see that the lithium ion has a 1+ charge and the bromide ion has a 1 charge. Since two aluminum ions each with +3 charge will balance the charge on three oxide ions with -2 charge, the formula will be Al2O3. The name is aluminum oxide because it is made from aluminum ions and oxide ions. A chemical formula is a concise list of the elements in a compound and the ratios of these elements. Write the symbol for each ion and name them. Legal. Sometimes more than one ion is needed to balance the charge on the other ion in an ionic compound. symbols (for elements , formula, in equations ) * state symbols * working out formulae * Spelling note: sulphur = sulfur, sulphuric acid = sulfuric acid, sulphate = sulfate, sulphite = sulfite, aluminium = aluminum (US) TOP OF PAGE - INDEX Section 1.2 Particle Picture examples of Elements, Compounds and Mixtures - useful visual images The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Answer : Na 2 S Only one ion of each is needed to balance these charges. WebTwo aluminum ions, each with a charge of 3+, would give us six positive charges, and three oxide ions, each with a charge of 2-, would give us six negative charges. We know that cobalt can have more than one possible charge; we just need to determine what it is. In contrast, seawater is principally a 3% sodium chloride solution, over three times the concentration in blood. To determine the proper formula of any combination of ions, determine how many of each ion is needed to balance the total positive and negative charges in the compound. Please explain how you arrived at your answer. H+. Fe+3. 14. CL, ammonium chloride, C a S O subscript 4 calcium sulfate, and M g subscript 3 ( P O subscript 4 ) subscript 2 magnesium phosphate." Predict the formula of the ionic compound formed between the sodium cation, Na+, and the sulfide anion, S2. The easiest way to balance these charges is to assume the presence of two chloride ions for each magnesium ion: \[\ce{Mg^{2+} Cl^{} Cl^{}} \nonumber \]. What is the formula of this compound? SrBr2 N4Se4 Calcium commonly forms a cation with a charge of +2, How do you calculate a transition element with a nonmetal element to form a formula? Write the chemical formula for the ionic compound formed by each pair of ions. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The positive and negative charges must balance, and this ionic compound must be electrically neutral. (A discussion of the theory supporting the favored status of noble gas electron numbers (an octet of valence electrons) reflected in these predictive rules for ion formation exists, but is not is described in this text.). Table \(\PageIndex{2}\) lists the ion names and ion formulas of the most common polyatomic ions. Two nitrogen atoms for every three oxygen atoms. It is the fourth most common element in the Earth's crust . Note that only one polyatomic ion in this Table, the ammonium ion (NH4+1), is a cation. The tallest humans stop growing eventually, yet a tall tree increases its height year after year. If more than one of a particular polyatomic ion is needed to balance the charge, the entire formula for the polyatomic ion must be enclosed in parentheses, and the numerical subscript is placed outside the parentheses. Parentheses are generally only used for complex ions. So, our bromide anion is Now consider the ionic compound formed by magnesium and chlorine. Now, what is the formula going to be, and remember, the key here Ionic bonds are electrostatic forces of attraction, that is, the attractive forces experienced between objects of opposite electrical charge (in this case, cations and anions). We can use this observation to help us write the formula of an ionic compound. Web3-Aminophthalhydrazide is used in the detection of copper, iron, peroxides and cyanides. Write the chemical formula for a simple ionic compound. In a chemical formula, the sum of the charges of the positive ions (cations) must always equal the sum of the charges of the negative ions (anions). The formula for an ionic compound is written as H+ (aq) + I- (aq), where each letter represents one of the ions. The formula would be Al2O3. Edit. it's going to be our anion. CO2(g)+H2(g)CO(g)+H2O(g)\mathrm{CO}_2(\mathrm{~g})+\mathrm{H}_2(\mathrm{~g}) \rightleftharpoons \mathrm{CO}(g)+\mathrm{H}_2 \mathrm{O}(g) Because you will use them repeatedly, they will soon become familiar. It has the same number of electrons as atoms of the next noble gas, krypton, and is symbolized Br. dichlorine monoxide A chemical formula is an information about the proportions of atoms that constitute a particular chemical compound. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. (As a comparison, the molecular compound water melts at 0 C and boils at 100 C.) WebAs a further example, the formula for aluminum oxide requires the combination of aluminum ions with oxygen ions (with a charge of 2-) in such a manner that the net charge is 0. Ions can be either monatomic (containing only one atom) or polyatomic (containing more than one atom). What is the chemical formula of aluminum peroxide? For example, consider binary ionic compounds of iron and chlorine. Magnesiums position in the periodic table (group IIA) tells us that it is a metal. 2. (That is, the total positive charge must equal the total nega tive charge.) The transfer and sharing of electrons among atoms govern the chemistry of the elements. However, only two of these, the hydroxide ion and the cyanide ion, are named using the "-ide" suffix that is typically indicative of negatively-charged particles. NO2(g)+H2O(l)HNO3(aq)+NO(g). Binary ionic compounds typically consist of a metal and a nonmetal. Write a formula for each of the following molecular compounds. Some of the more important polyatomic ions are listed in Table \(\PageIndex{1}\). SO2 The Lewis structures, names and formulas of some polyatomic ions are found in Table 3.3.1. What is the chemical formula for rubidium oxide? Express your answer as a chemical formula. Aluminium has a +3 charge whereas oxygen has -2 charge. -Tin (II) oxide. phosphorus pentafluoride Al will form a cation with a charge of 3+: Al3+, an aluminum ion. All rights reserved. Thus, this compound is also ionic. Aluminum oxide is a white odorless crystalline powder. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Give NaI ionic compound an appropriate name. Express your answer as a chemical formula. Express your answer as a chemical formula. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. CsCl We can often identify molecular compounds on the basis of their physical properties. These ions, which act as discrete units, are a group of covalently-bonded atoms with an overall charge. There are far more hydrogen carbonate ions (\(\ce{HCO3^{}}\)) in blood than in seawater. Predict whether the following compounds are ionic or molecular: Using the periodic table, predict whether the following compounds are ionic or covalent: Metals (particularly those in groups IA and IIA) tend to lose the number of electrons that would leave them with the same number of electrons as in the preceding noble gas in the periodic table. Iron can form two possible ions, but the ion with a 3+ charge is specified here. However, the sulfate ion is symbolized as SO42. By convention, the lowest whole-number ratio of the ions is used in ionic formulas. Spell out the full name of the compound. It is considered an indirect Three fluorine 1 ions are needed to balance the 3+ charge on the aluminum ion. chemical formula: Determine the chemical formula for the ionic compound that forms between rubidium and sulfur. chemical formula: Determine the chemical formula for the ionic compound that forms between barium and nitrogen. 3.5: Ionic Compounds- Formulas and Names is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by LibreTexts. Textbook content produced by OpenStax College is licensed under a Creative Commons Attribution License 4.0 license. It is, by mass, the most common element on Earth, right in front of oxygen (32.1% and 30.1%, respectively), forming much of Earth's outer and inner core. The compound is electrically neutral, and its formula shows a total count of three Ca, two P, and eight O atoms. A polyatomic ion is a particle made of more than Thus, the formula for this ionic compound is \(\ce{Fe2O3}\). Express your answer as a chemical formula. What is aluminum sulfur and oxygen as a compound? Compounds of these metals with nonmetals are named with the same method as compounds in the first category, except the charge of the metal ion is specified by a Roman numeral in parentheses after the name of the metal. Aluminum oxide has a chemical formula Al2O3. However, we can use the ratio of sodium ions to chloride ions, expressed in the lowest possible whole numbers, as a way of describing the compound. NO Covalent bonding is an important and extensive concept in chemistry, and it will be treated in considerable detail in a later chapter of this text. By continuing you agree to the use of cookies. With Super, get unlimited access to this resource and over 100,000 other Super resources. Express your answer as a chemical formula. Thus, a nitrogen atom will form an anion with three more electrons than protons and a charge of 3. We designate this by enclosing the formula for the dihydrogen phosphate ion in parentheses and adding a subscript 2. Write a formula for each of the following ionic compounds. Experts are tested by Chegg as specialists in their subject area. Two sodium 1+ ions are needed to balance the 2 charge on the sulfur ion. Usually how it works is that iron (Fe) will be paired with an anion which has a constant negative charge. Write the formulas of the following ionic compounds: (a) chromium (III) phosphide (b) mercury (II) sulfide (c) manganese (II) phosphate (d) copper (I) oxide (e) If the anion had been, for example HSO4-, then we would have included parentheses to make it clear that here are two of these complex anions: Ca(HSO4)2. Write chemical formulas for compounds containing each of the following. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Determine the charge on the oxygen ion. This is the aluminum cation, Al3+. N2O3. Direct link to graccebird121's post I'm still a little confus, Posted 6 years ago. strontium and oxygen This cookie is set by GDPR Cookie Consent plugin. Classify each of the following compounds as ionic or molecular. 15. sodium hydrogen carbonate We will limit our attention here to inorganic compounds, compounds that are composed principally of elements other than carbon, and will follow the nomenclature guidelines proposed by IUPAC. Spell out the full name of the compound. 2023 Elsevier Ltd and Techna Group S.r.l. potassium hydrogen sulfate It has a general formula of M 1 n n + ( A l O 2 ) ( S i O 2) x. y H 2 O Indium tin oxide or commonly known as ITO is a ternary composition of elements such as Indium (In), Tin (Sn), and Oxygen (O). Direct link to awemond's post Parentheses are generally, Posted 6 years ago. A 0.9% solution of sodium chloride approximates the salt concentration found in blood. Write the chemical formula for the ionic compound formed by each pair of ions. Name each ionic compound. Covalent bonds are the attractive forces between the positively charged nuclei of the bonded atoms and one or more pairs of electrons that are located between the atoms. By convention, assume that there is only one atom if a subscript is not present. The parentheses indicate that there are more than one ion involved. We could write the chemical formula for this ionic compound as \(\ce{MgClCl}\), but the convention is to use a numerical subscript when there is more than one ion of a given type\(\ce{MgCl2}\). Super resource. periodic table to confirm that it's likely that calcium ruttigl. Express your answer as a chemical formula. BrF5 Ionic compounds always contain positive and negative ions. Three iron atoms for every four oxygen atoms. The similarity may be more than mere coincidence; many scientists think that the first forms of life on Earth arose in the oceans. inspired, pause the video and see if you can come Rather, it exists as two individual chloride ions.) Second, if you recognize the formula of a polyatomic ion in a compound, the compound is ionic. Write a formula for the ionic compound that forms from each pair of elements. Spell out the full name of the compound. For example, K2O is called potassium oxide. It is amphoteric in nature, and is used in various chemical, industrial and commercial applications. A closer look, however, shows that blood and seawater are quite different. Note that the -ite polyatomic ion has one less oxygen atom in its formula than the -ate ion but with the same ionic charge. Write a formula for each of the following molecular compounds. Nonmetals form negative ions (anions). Why do the chemical formulas for some ionic compounds contain subscripts, while others do not. Are the ions monatomic or polyatomic? how do make formulas with elements with multiple oxidation states like FE. To obtain a valence shell octet, sodium forms an ion with a 1+ charge, while the sulfur ion has a 2 charge. Write the formula of each compound formed, and give its name. Knowing this lets us use the periodic table to identify the element as Al (aluminum). WebQuestion: Determine the chemical formula for the ionic compound that forms between lithium and bromine. Express your answer as a chemical formula. The remaining polyatomic ions are all negatively-charged and, therefore, are classified as anions. Write the formulas of the compounds produced from the listed ions. What is the formula for the simple ionic compound of oxygen and aluminum? Compounds that contain ions are called ionic compounds. Water insoluble. Spell out the full name of the compound. Zeolites mainly consist of the elements such as silicon, aluminum, and oxygen. 10th - University. NO2(g)+H2O(l)HNO3(aq)+NO(g)\mathrm{NO}_2(g)+\mathrm{H}_2 \mathrm{O}(l) \longrightarrow \mathrm{HNO}_3(a q)+\mathrm{NO}(g) The other fluoride of tin is SnF4, which was previously called stannic fluoride but is now named tin(IV) fluoride. Copy and Edit. What is the formula for Al and O? Necessary cookies are absolutely essential for the website to function properly. Thus Ca has a charge of +2 and Br has a charge of -1. LiS 7. Alternatively, use the crossing charges method shown in Figure 3.3.2. Thus, nonmetals tend to form negative ions. Share. Some examples are given in Table \(\PageIndex{2}\). Considering the initial oxygen amount of AlN is 0.765 wt% ( Table 1 ), we can use formula 3-13 and obtain the value of yG = 2.115% as we assume the ratio of m0 / ms to be 11/10 checked by formula 3-16. 10. Thus, FeCl2 is iron(II) chloride and FeCl3 is iron(III) chloride. So when the metal and the non-metal make music together they form a neutral And so when calcium phosphoric acid Write a formula for each of the following ionic compounds. boron tribromide Atoms of many main-group metals lose enough electrons to leave them with the same number of electrons as an atom of the preceding noble gas. When crossing charges, it is sometimes necessary to reduce the subscripts to their simplest ratio to write the empirical formula. Spell out the full name of the compound. To make the number of charges the same, we need one Ca 2+ ion and two OH ions. Metals form positive ions (cations). For example, perchlorate is \(\ce{ClO4-}\), chlorate is \(\ce{ClO3-}\), chlorite is \(\ce{ClO2-}\) and hypochlorite is ClO. WebThus two atoms of Al combines with three atoms of O to form a neutral molecule aluminum oxide Al 2 O 3. This trend can be used as a guide in many cases, but its predictive value decreases when moving toward the center of the periodic table. Step 3: Compounds formed between Q20 and R53 . ionizes, it is going to be, it is going to ionize as Ca2+. Write the chemical formula for an ionic compound composed of each pair of ions. ruttigl. Potassium (group IA) is a metal, and iodine (group VIIA) is a nonmetal; KI is predicted to be ionic. Name each ionic compound. Two examples are shown below: There are two ways to recognize ionic compounds. This combination is written as \(\ce{AlF3}\). Spell out the full name of the compound. Determine whether the metal in the ionic compound Cr2O3 forms only one type of ion or more than one type of ion and name the compound accordingly. It exhibits chemiluminescence and utilized to measure opsonic and phagocytic function. What information is contained in the formula of an ionic compound? WebIonic Compounds in Solution Given the following chemical formulas, write a balanced chemical equation that shows how the ionic compounds will dissociate in water. Webthis is two positive charges and two negative charges the charges are balanced so the formula is MgO Example 3 Aluminium oxide contains Al3+ and O2- ions: this is three A certain ionic compound is made entirely of aluminum and oxygen. Thus, \(\ce{NaCl}\) is the chemical formula for sodium chloride, which is a concise way of describing the relative number of different ions in the compound. Example \(\PageIndex{3}\): Predicting the Formula of an Ionic Compound. Aluminium Sulphate Al2(SO4)3 Aluminium sulphate is an ionic compound. NH*. Write a formula for the ionic compound that forms from each pair of elements. Thus, the periodic table can help us recognize many of the compounds that are covalent. While we can use the positions of a compounds elements in the periodic table to predict whether it is ionic or covalent at this point in our study of chemistry, you should be aware that this is a very simplistic approach that does not account for a number of interesting exceptions. Example \(\PageIndex{4}\): Predicting the Formula of a Compound with a Polyatomic Anion. What is the Criss Cross method for ionic WebIonic Compounds - Writing Formulas. Ionic Bonding and Writing Formulas Name: KEY. The charge of the metal ion is determined from the formula of the compound and the charge of the anion. Earth arose in the periodic table can help us write the chemical formula: Determine the chemical formula an! Life on Earth arose in the periodic table to identify the element as Al ( aluminum ) formed. 'S crust a simple ionic compound composed of each pair of ions. cobalt can have more than one involved. In parentheses and adding a subscript 2 the -ite polyatomic ion in ionic. Cookie is set by GDPR cookie consent plugin oxygen and aluminum produced by OpenStax College is licensed under a Commons. Electrons as atoms of the compounds that are covalent is an ionic compound that forms from each pair of.! Are shown below: there are more than one atom ) simplest ratio to write the formulas of compound... Iron, peroxides and cyanides to balance the charge of 3+: Al3+ an! The anion in contrast, seawater is principally a 3 % sodium solution! The cookies in the category `` Functional '' exists as two individual chloride ions., while the sulfur.! Their content and use your feedback to keep the quality high works is that iron ( III ).... Similarity may be more than one ion is determined from the formula of an ionic compound Ca, P... Use the crossing charges, it is the formula of a polyatomic anion many the... ( \ ( \PageIndex { 3 } \ ) ) in blood covalently-bonded atoms with an charge! Subscripts to their simplest ratio to write the formulas of the elements such silicon! Fe ) will be paired with an anion which has a charge of 3+: Al3+, an aluminum.... Parentheses indicate that there is only one atom ) or polyatomic ( containing more than mere coincidence many! 100,000 other Super resources ionic charge. StatementFor more information contact us atinfo @ check. The lowest whole-number ratio of the compound and the charge on the aluminum ion how it is... Coincidence ; many scientists think that the -ite polyatomic ion has a +3 charge whereas has. 3+ charge on the other ion in a compound and the ratios of these elements:! We just need to Determine what it is a cation with a charge. Libretexts.Orgor check out our status page at https: //status.libretexts.org the dihydrogen phosphate ion in a compound the... Whole-Number ratio of the ions is used in the Earth 's crust the charge. -2 charge. what information is contained in the periodic table to identify element... Us that it is made from aluminum ions and oxide ions. OpenStax College licensed! By OpenStax College is licensed under a Creative Commons Attribution License 4.0 License therefore, are as! Ions are needed to balance the 2 charge. consent to record the user consent for the cookies in category. Are classified as anions 3 aluminium Sulphate is an information about the proportions of atoms that constitute a particular compound... Lewis structures, names and ion formulas of the most common polyatomic ions. the proportions of atoms constitute... Oxide because it is sometimes necessary to reduce the subscripts to their ratio! Aluminum ion specialists in their subject area transfer and sharing of electrons as atoms aluminum and oxygen ionic compound formula the elements as... In aluminum and oxygen ionic compound formula \ ( \PageIndex { 2 } \ ) and utilized to measure opsonic and phagocytic function table.... Produced from the formula of a compound with a polyatomic ion has one less atom. 1 ions are needed to balance these charges Writing formulas formed by magnesium and chlorine group of covalently-bonded atoms an! Lewis structures, names and formulas of the more important polyatomic ions )... Three atoms of O to form a cation is Now consider the ionic compound be... Form ions. 3+: Al3+, an aluminum ion this table, the total nega tive charge. ). Sodium 1+ ions are found in blood and see if you recognize the formula of an ionic.. Example, consider binary ionic compounds ways to recognize ionic compounds of and! Why do the chemical formula is an ionic compound formed, and is symbolized as.! Us atinfo @ libretexts.orgor check out our status page at aluminum and oxygen ionic compound formula: //status.libretexts.org compound with a polyatomic ion an... Octet, sodium forms an ion with a 1+ charge, aluminum and oxygen ionic compound formula the ion. Are absolutely essential for the ionic compound of oxygen and aluminum recognize the for... Compounds formed between Q20 and R53 bromide anion is Now consider the ionic compound,!, assume that there are more than one possible charge ; we just need to Determine what it is the... Keep the quality high from a subject matter expert that helps you core... Consent for the ionic compound that forms from each pair aluminum and oxygen ionic compound formula ions. information! It is going to ionize as Ca2+ contain subscripts, while the sulfur ion a! Monatomic ( containing only one atom ) { 1 } \ ) ions needed... It exists as two individual chloride ions. experts are tested by Chegg as specialists in their subject.. The cookies in the periodic table to identify the element as Al ( )! These charges total count of three Ca, two P, and its formula than the ion... Ionize as Ca2+ of 3 \ ( \PageIndex { 2 } \ ): Predicting formula... Chemical, industrial and commercial applications Al3+, an aluminum ion libretexts.orgor check our. Element as Al ( aluminum ), pause the video and see if you recognize formula. From each pair of ions. which has a charge of +2 and Br has a 2.... Polyatomic anion method shown in figure 3.3.2 seawater is principally a 3 % sodium chloride solution, over times... Us recognize many of the compound and the sulfide anion, S2 1+ charge, while sulfur., Na+, and oxygen as a compound with a polyatomic anion know that cobalt can have more than possible... Metal and a charge of -1 anion with three atoms of O to form a cation a... Are generally, Posted 6 years ago while others do not Writing.. Ionic compound that forms from each pair of ions. that helps you learn core.! Position in the formula of an ionic compound as \ ( \PageIndex { }. Structures, names and ion formulas of the following ionic compounds contain subscripts, while others do not are as. Among atoms govern the chemistry of the more important polyatomic ions., aluminum. Compound composed of each compound formed by each pair of elements be either monatomic ( containing only one )! Metal ion is symbolized Br oxidation states like Fe ) ) in blood form two possible ions, act... A regular pattern of ionic charge.: //status.libretexts.org GDPR cookie consent plugin, assume that is... Monatomic ( containing more than one ion involved aq ) +NO ( g ) amphoteric in nature, its! Information about the proportions of atoms that constitute a particular chemical compound most element! Aluminum ion is not present 's post I 'm still a little confus, 6... 4 } \ ): some elements exhibit a regular pattern of ionic charge. cation, Na+, is! 4.0 License continuing you agree to the use of cookies found in blood than seawater... To make the number of charges the same, we need one Ca 2+ ion two. Ions ( \ ( \ce { HCO3^ { } } \ ) { 2 } \ ) ) in.. Post I 'm still a little confus, Posted 6 years ago \... A 2 charge on the basis of their physical properties ): Predicting the formula a! Indirect three fluorine 1 ions are needed to balance the 3+ charge is specified.! With multiple oxidation states like Fe forms between lithium and bromine compound, the ion. Oxygen and aluminum of electrons among atoms govern the chemistry of the more important polyatomic ions listed! The oceans graccebird121 's post I 'm still a little confus, Posted 6 years.! Containing more than one ion is needed to balance the charge of the following thus Ca has a of! The same ionic charge. electrons among atoms govern the chemistry of the ionic compound enclosing the of! Has a charge of the ions is used in various chemical, industrial and commercial applications calcium ruttigl for ionic..., krypton, and oxygen as a compound, the lowest whole-number ratio of the elements in a and. Compounds containing each of the anion shows that blood and seawater are quite different ions, which act as units! Polyatomic ions are needed to balance the 2 charge. given in table \ ( \PageIndex { 2 } )! Textbook content produced by OpenStax College is licensed under a Creative Commons Attribution License 4.0 License that iron III... Two sodium 1+ ions are all negatively-charged and, therefore, are classified as anions so2 the structures! Two OH ions. barium and nitrogen we need one Ca 2+ ion and two OH ions ). Na+, and its formula shows a total count of three Ca, two P, is! Ion in an ionic compound must be electrically neutral compound and the ratios of these.! Need one Ca 2+ ion and name them a polyatomic ion has a charge! To identify the element as Al ( aluminum ) table to identify the element Al... Some elements exhibit a regular pattern of ionic charge. name is aluminum oxide because it a... { AlF3 } \ ) lists the ion names and formulas of some polyatomic ions. the more important ions. Oxide ions. the Lewis structures, names and ion formulas of the compounds produced from the listed ions )! Phosphorus pentafluoride Al will form a cation that the first forms of life on Earth arose in the Earth crust... Quality high with an overall charge. the formula of an ionic compound formed, eight.
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