Ionic Compound Naming Flashcards: Names, Formulas & Charge Balance
Practice ionic compound naming with 56 English flashcards on neutral formulas, Roman numerals, polyatomic-ion parentheses, and common errors.
حول هذه الرزمة
Practice ionic compound names and neutral formulas with 56 English flashcards. This focused deck is for high-school and introductory-college learners who know basic ions and want to apply charge balance consistently.
The cards practice names to formulas, selected formulas back to names, metal-charge inference, one polyatomic-group count, and short repairs of incorrect formulas or missing naming information. Ion charges and polyatomic-ion names are supplied where the target is applying a rule. This is compound-naming practice rather than a table of isolated ions; use the polyatomic ion flashcards for that prerequisite.
The sequence begins with neutrality, cation-first order, subscripts, and the smallest whole-number ratio of intact ions. Fixed-charge binary salts come next, followed by iron, copper, and tin Stock names. Polyatomic groups and ammonium then lead into mixed formula, naming, and error-repair prompts. Selected reverse directions and closely related variants are separated. Every card carries the ionic-naming tag; the review scheduler handles longer-term spacing.
Names follow the usual introductory convention: fixed-charge cations without Roman numerals, variable-charge monatomic metals with Stock Roman numerals, and familiar polyatomic-ion names. Aluminum and aluminium are accepted spelling variants; sodium hydrogen carbonate and sodium bicarbonate are both accepted. This convention does not exhaust all valid systematic names. Arbitrary name-to-example prompts and exhaustive reversals are omitted because they add ambiguity or repetition. Covalent naming, acids, hydrates, organic compounds, coordination complexes, peroxide and mercury(I) special cases, reactions, and solubility are outside this deck. No full-course or examination alignment is claimed.
The questions, explanations, order, and metadata were written independently with AI assistance. Naming and ion facts were checked against Purdue University’s ionic-naming rules and ion reference tables. No competitor cards, source exercise wording, examination questions, or source diagrams were copied. Reference works retain their own rights, and chemical facts are not claimed as proprietary. Original material, including the AI-generated decorative charge-symbol cover, is dedicated under CC0 1.0 to the extent applicable rights exist. This is independent study material without institutional endorsement.
بطاقات هذه الرزمة
البطاقة ١
السؤال
In a neutral ionic formula unit, what must the total ionic charge be?
الإجابة
Zero. The positive and negative charges must cancel.
البطاقة ٢
السؤال
When naming a simple ionic compound, which ion is named first?
الإجابة
The cation, followed by the anion.
البطاقة ٣
السؤال
Write the formula for lithium fluoride using Li⁺ and F⁻.
الإجابة
LiF. One ion of each kind gives +1 − 1 = 0.
البطاقة ٤
السؤال
In CaCl₂, what does the subscript 2 count?
الإجابة
Two chloride ions for each calcium ion. It does not mean that each chloride ion has a charge of −2.
البطاقة ٥
السؤال
Name MgO using the usual fixed-charge ionic naming convention.
الإجابة
Magnesium oxide. The ions are Mg²⁺ and O²⁻.
البطاقة ٦
السؤال
What is the smallest neutral ratio of Al³⁺ ions to O²⁻ ions?
الإجابة
Two Al³⁺ ions to three O²⁻ ions: +6 and −6 cancel.
البطاقة ٧
السؤال
Write the formula for magnesium bromide using Mg²⁺ and Br⁻.
الإجابة
MgBr₂. Two bromide ions balance one magnesium ion.
البطاقة ٨
السؤال
Name Na₂S using the usual fixed-charge ionic naming convention.
الإجابة
Sodium sulfide. The sulfur anion is called sulfide.
البطاقة ٩
السؤال
Write the simplest formula for calcium oxide using Ca²⁺ and O²⁻.
الإجابة
CaO. Equal and opposite charges give a 1:1 ion ratio.
البطاقة ١٠
السؤال
Write the formula for aluminum nitride using Al³⁺ and N³⁻.
الإجابة
AlN. One ion of each kind is neutral. Aluminium nitride is the same compound, with the British spelling.
البطاقة ١١
السؤال
Name Mg₃N₂ using the usual fixed-charge ionic naming convention.
الإجابة
Magnesium nitride. Three Mg²⁺ ions balance two N³⁻ ions.
البطاقة ١٢
السؤال
Write the formula for lithium oxide using Li⁺ and O²⁻.
الإجابة
Li₂O. Two lithium ions balance one oxide ion.
البطاقة ١٣
السؤال
Name CaF₂ using the usual fixed-charge ionic naming convention.
الإجابة
Calcium fluoride. This convention uses the ion names without a di- prefix for the two fluoride ions.
البطاقة ١٤
السؤال
A student writes Mg₂O₂ for magnesium oxide, using Mg²⁺ and O²⁻. What is the simplest formula?
الإجابة
MgO. The 2:2 ion ratio is neutral but reduces to 1:1.
البطاقة ١٥
السؤال
Name Al₂S₃ using the usual fixed-charge ionic naming convention.
الإجابة
Aluminum sulfide (also spelled aluminium sulfide). Two Al³⁺ ions balance three S²⁻ ions.
البطاقة ١٦
السؤال
Write the formula for sodium phosphide using Na⁺ and P³⁻.
الإجابة
Na₃P. Three sodium ions balance one phosphide ion.
البطاقة ١٧
السؤال
Name LiF using the usual fixed-charge ionic naming convention.
الإجابة
Lithium fluoride. Name the lithium cation first and the fluoride anion second.
البطاقة ١٨
السؤال
Write the formula for magnesium oxide using Mg²⁺ and O²⁻.
الإجابة
MgO. The smallest neutral ratio is one magnesium ion to one oxide ion.
البطاقة ١٩
السؤال
In the Stock name iron(III) chloride, what does III specify?
الإجابة
A +3 charge on each iron ion. For this monatomic ion, its charge equals its oxidation state; III is not an atom count.
البطاقة ٢٠
السؤال
Name FeCl₂ using Stock nomenclature. Chloride is Cl⁻.
الإجابة
Iron(II) chloride. Two chloride ions total −2, so the iron ion is Fe²⁺.
البطاقة ٢١
السؤال
What is the charge on each copper ion in Cu₂O, taking oxide as O²⁻?
الإجابة
+1. The two copper ions together must supply +2, so each is Cu⁺.
البطاقة ٢٢
السؤال
Write the formula for tin(IV) oxide, using oxide O²⁻.
الإجابة
SnO₂. One Sn⁴⁺ ion balances two oxide ions; reduce a crossed 2:4 ratio to 1:2.
البطاقة ٢٣
السؤال
Name Fe₂O₃ using Stock nomenclature. Oxide is O²⁻.
الإجابة
Iron(III) oxide. Three oxide ions total −6; divided between two iron ions, that requires Fe³⁺.
البطاقة ٢٤
السؤال
Write the formula for copper(II) bromide, using bromide Br⁻.
الإجابة
CuBr₂. One Cu²⁺ ion needs two bromide ions.
البطاقة ٢٥
السؤال
Name SnCl₂ using Stock nomenclature. Chloride is Cl⁻.
الإجابة
Tin(II) chloride. Two Cl⁻ ions require one Sn²⁺ ion.
البطاقة ٢٦
السؤال
Write the formula for iron(II) chloride, using chloride Cl⁻.
الإجابة
FeCl₂. One Fe²⁺ ion balances two chloride ions.
البطاقة ٢٧
السؤال
Name CuO using Stock nomenclature. Oxide is O²⁻.
الإجابة
Copper(II) oxide. The 1:1 ratio requires Cu²⁺ to balance O²⁻.
البطاقة ٢٨
السؤال
Write the formula for iron(III) sulfide, using sulfide S²⁻.
الإجابة
Fe₂S₃. Two Fe³⁺ ions supply +6 and three sulfide ions supply −6.
البطاقة ٢٩
السؤال
Why is the name copper chloride insufficient to choose a single formula in introductory Stock nomenclature?
الإجابة
It omits the copper oxidation state. Copper(I) chloride is CuCl; copper(II) chloride is CuCl₂.
البطاقة ٣٠
السؤال
Name SnO₂ using Stock nomenclature. Oxide is O²⁻.
الإجابة
Tin(IV) oxide. Two oxide ions total −4, so the tin ion is Sn⁴⁺.
البطاقة ٣١
السؤال
A student labels Fe₂O₃ as iron(II) oxide. Keeping the name iron(II) oxide, what formula should replace it?
الإجابة
FeO. Fe²⁺ and O²⁻ balance in a 1:1 ratio; Fe₂O₃ instead corresponds to iron(III) oxide.
البطاقة ٣٢
السؤال
Name CaCl₂ using the usual introductory fixed-charge convention.
الإجابة
Calcium chloride. Calcium is treated as Ca²⁺, so this convention omits the Roman numeral. An explicit oxidation-state name is not a different compound.
البطاقة ٣٣
السؤال
Write the formula for sodium nitrate using Na⁺ and NO₃⁻.
الإجابة
NaNO₃. One nitrate ion balances one sodium ion; keep the nitrate formula intact.
البطاقة ٣٤
السؤال
Name K₂CO₃. The polyatomic ion CO₃²⁻ is carbonate.
الإجابة
Potassium carbonate. Two K⁺ ions balance one carbonate ion.
البطاقة ٣٥
السؤال
When writing a conventional ionic formula, when do you put a polyatomic ion in parentheses?
الإجابة
When more than one of that whole ion is needed. Put the count outside the parentheses and leave the ion’s internal subscripts unchanged.
البطاقة ٣٦
السؤال
Write the formula for calcium hydroxide using Ca²⁺ and OH⁻.
الإجابة
Ca(OH)₂. Two whole hydroxide ions balance one calcium ion.
البطاقة ٣٧
السؤال
Name NH₄Cl. NH₄⁺ is ammonium.
الإجابة
Ammonium chloride. The cation is the whole NH₄⁺ ion, even though it contains no metal.
البطاقة ٣٨
السؤال
Write the formula for aluminum sulfate using Al³⁺ and SO₄²⁻.
الإجابة
Al₂(SO₄)₃. Two aluminum ions supply +6 and three intact sulfate ions supply −6.
البطاقة ٣٩
السؤال
Name Mg(NO₃)₂. NO₃⁻ is nitrate.
الإجابة
Magnesium nitrate. One Mg²⁺ ion is balanced by two nitrate ions.
البطاقة ٤٠
السؤال
Write the formula for ammonium phosphate using NH₄⁺ and PO₄³⁻.
الإجابة
(NH₄)₃PO₄. Three ammonium ions balance one phosphate ion; only ammonium needs parentheses.
البطاقة ٤١
السؤال
How many whole hydroxide ions are represented in one formula unit of Ba(OH)₂?
الإجابة
Two hydroxide ions. The outer subscript multiplies the entire OH group, giving two O atoms and two H atoms.
البطاقة ٤٢
السؤال
Name Fe₂(SO₄)₃ using Stock nomenclature. SO₄²⁻ is sulfate.
الإجابة
Iron(III) sulfate. Three sulfate ions total −6, so each of the two iron ions has charge +3.
البطاقة ٤٣
السؤال
Write the formula for calcium nitrate using Ca²⁺ and NO₃⁻.
الإجابة
Ca(NO₃)₂. Two intact nitrate ions supply −2 to balance calcium’s +2.
البطاقة ٤٤
السؤال
Name (NH₄)₂SO₄. NH₄⁺ is ammonium and SO₄²⁻ is sulfate.
الإجابة
Ammonium sulfate. Two ammonium ions balance one sulfate ion.
البطاقة ٤٥
السؤال
Write the formula for magnesium phosphate using Mg²⁺ and PO₄³⁻.
الإجابة
Mg₃(PO₄)₂. Three magnesium ions and two phosphate ions give +6 and −6.
البطاقة ٤٦
السؤال
Name NaHCO₃. HCO₃⁻ is hydrogen carbonate, also called bicarbonate.
الإجابة
Sodium hydrogen carbonate, also called sodium bicarbonate. HCO₃⁻ is one intact anion.
البطاقة ٤٧
السؤال
Repair AlOH₃ as the formula for aluminum hydroxide, using Al³⁺ and OH⁻.
الإجابة
Al(OH)₃. Three whole hydroxide ions are needed. AlOH₃ fails to multiply the oxygen count along with the hydrogen count.
البطاقة ٤٨
السؤال
Write the formula for ammonium sulfite using NH₄⁺ and SO₃²⁻.
الإجابة
(NH₄)₂SO₃. Two ammonium ions balance one sulfite ion; sulfite retains its three oxygen atoms.
البطاقة ٤٩
السؤال
Name Cu(NO₃)₂ using Stock nomenclature. NO₃⁻ is nitrate.
الإجابة
Copper(II) nitrate. Two nitrate ions total −2, requiring Cu²⁺.
البطاقة ٥٠
السؤال
Write the formula for iron(III) sulfate, using sulfate SO₄²⁻.
الإجابة
Fe₂(SO₄)₃. Two Fe³⁺ ions balance three sulfate ions.
البطاقة ٥١
السؤال
Repair K(CO₃)₂ as the formula for potassium carbonate, using K⁺ and CO₃²⁻.
الإجابة
K₂CO₃. Two potassium ions balance one carbonate ion. A single carbonate group needs no parentheses.
البطاقة ٥٢
السؤال
Can Mg(NO₃)₂ be simplified to MgNO₃ by removing the outer subscript? Use Mg²⁺ and NO₃⁻.
الإجابة
No. The ion ratio is already 1:2. Removing the outer 2 would leave total charge +1 instead of zero.
البطاقة ٥٣
السؤال
Name Ca(OH)₂. OH⁻ is hydroxide.
الإجابة
Calcium hydroxide. The two hydroxide ions balance one Ca²⁺ ion; the ion name stays hydroxide.
البطاقة ٥٤
السؤال
What is the charge on each copper ion in Cu₃(PO₄)₂, taking phosphate as PO₄³⁻?
الإجابة
+2. Two phosphate ions total −6, shared equally among three copper ions as +2 each.
البطاقة ٥٥
السؤال
Write the formula for sodium nitrite using Na⁺ and NO₂⁻.
الإجابة
NaNO₂. One nitrite ion balances one sodium ion. Keep NO₂⁻ intact; NO₃⁻ would be nitrate.
البطاقة ٥٦
السؤال
Repair NH₄SO₄ as the formula for ammonium sulfate, using NH₄⁺ and SO₄²⁻.
الإجابة
(NH₄)₂SO₄. Two whole ammonium ions are required to balance one sulfate ion; the 2 goes outside the ammonium parentheses.
٥٦ بطاقة
Ionic Compound Naming Flashcards: Names, Formulas & Charge Balance
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