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.
Despre acest pachet
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.
Fișele din acest pachet
Fișa 1
Întrebare
In a neutral ionic formula unit, what must the total ionic charge be?
Răspuns
Zero. The positive and negative charges must cancel.
Fișa 2
Întrebare
When naming a simple ionic compound, which ion is named first?
Răspuns
The cation, followed by the anion.
Fișa 3
Întrebare
Write the formula for lithium fluoride using Li⁺ and F⁻.
Răspuns
LiF. One ion of each kind gives +1 − 1 = 0.
Fișa 4
Întrebare
In CaCl₂, what does the subscript 2 count?
Răspuns
Two chloride ions for each calcium ion. It does not mean that each chloride ion has a charge of −2.
Fișa 5
Întrebare
Name MgO using the usual fixed-charge ionic naming convention.
Răspuns
Magnesium oxide. The ions are Mg²⁺ and O²⁻.
Fișa 6
Întrebare
What is the smallest neutral ratio of Al³⁺ ions to O²⁻ ions?
Răspuns
Two Al³⁺ ions to three O²⁻ ions: +6 and −6 cancel.
Fișa 7
Întrebare
Write the formula for magnesium bromide using Mg²⁺ and Br⁻.
Răspuns
MgBr₂. Two bromide ions balance one magnesium ion.
Fișa 8
Întrebare
Name Na₂S using the usual fixed-charge ionic naming convention.
Răspuns
Sodium sulfide. The sulfur anion is called sulfide.
Fișa 9
Întrebare
Write the simplest formula for calcium oxide using Ca²⁺ and O²⁻.
Răspuns
CaO. Equal and opposite charges give a 1:1 ion ratio.
Fișa 10
Întrebare
Write the formula for aluminum nitride using Al³⁺ and N³⁻.
Răspuns
AlN. One ion of each kind is neutral. Aluminium nitride is the same compound, with the British spelling.
Fișa 11
Întrebare
Name Mg₃N₂ using the usual fixed-charge ionic naming convention.
Răspuns
Magnesium nitride. Three Mg²⁺ ions balance two N³⁻ ions.
Fișa 12
Întrebare
Write the formula for lithium oxide using Li⁺ and O²⁻.
Răspuns
Li₂O. Two lithium ions balance one oxide ion.
Fișa 13
Întrebare
Name CaF₂ using the usual fixed-charge ionic naming convention.
Răspuns
Calcium fluoride. This convention uses the ion names without a di- prefix for the two fluoride ions.
Fișa 14
Întrebare
A student writes Mg₂O₂ for magnesium oxide, using Mg²⁺ and O²⁻. What is the simplest formula?
Răspuns
MgO. The 2:2 ion ratio is neutral but reduces to 1:1.
Fișa 15
Întrebare
Name Al₂S₃ using the usual fixed-charge ionic naming convention.
Răspuns
Aluminum sulfide (also spelled aluminium sulfide). Two Al³⁺ ions balance three S²⁻ ions.
Fișa 16
Întrebare
Write the formula for sodium phosphide using Na⁺ and P³⁻.
Răspuns
Na₃P. Three sodium ions balance one phosphide ion.
Fișa 17
Întrebare
Name LiF using the usual fixed-charge ionic naming convention.
Răspuns
Lithium fluoride. Name the lithium cation first and the fluoride anion second.
Fișa 18
Întrebare
Write the formula for magnesium oxide using Mg²⁺ and O²⁻.
Răspuns
MgO. The smallest neutral ratio is one magnesium ion to one oxide ion.
Fișa 19
Întrebare
In the Stock name iron(III) chloride, what does III specify?
Răspuns
A +3 charge on each iron ion. For this monatomic ion, its charge equals its oxidation state; III is not an atom count.
Fișa 20
Întrebare
Name FeCl₂ using Stock nomenclature. Chloride is Cl⁻.
Răspuns
Iron(II) chloride. Two chloride ions total −2, so the iron ion is Fe²⁺.
Fișa 21
Întrebare
What is the charge on each copper ion in Cu₂O, taking oxide as O²⁻?
Răspuns
+1. The two copper ions together must supply +2, so each is Cu⁺.
Fișa 22
Întrebare
Write the formula for tin(IV) oxide, using oxide O²⁻.
Răspuns
SnO₂. One Sn⁴⁺ ion balances two oxide ions; reduce a crossed 2:4 ratio to 1:2.
Fișa 23
Întrebare
Name Fe₂O₃ using Stock nomenclature. Oxide is O²⁻.
Răspuns
Iron(III) oxide. Three oxide ions total −6; divided between two iron ions, that requires Fe³⁺.
Fișa 24
Întrebare
Write the formula for copper(II) bromide, using bromide Br⁻.
Răspuns
CuBr₂. One Cu²⁺ ion needs two bromide ions.
Fișa 25
Întrebare
Name SnCl₂ using Stock nomenclature. Chloride is Cl⁻.
Răspuns
Tin(II) chloride. Two Cl⁻ ions require one Sn²⁺ ion.
Fișa 26
Întrebare
Write the formula for iron(II) chloride, using chloride Cl⁻.
Răspuns
FeCl₂. One Fe²⁺ ion balances two chloride ions.
Fișa 27
Întrebare
Name CuO using Stock nomenclature. Oxide is O²⁻.
Răspuns
Copper(II) oxide. The 1:1 ratio requires Cu²⁺ to balance O²⁻.
Fișa 28
Întrebare
Write the formula for iron(III) sulfide, using sulfide S²⁻.
Răspuns
Fe₂S₃. Two Fe³⁺ ions supply +6 and three sulfide ions supply −6.
Fișa 29
Întrebare
Why is the name copper chloride insufficient to choose a single formula in introductory Stock nomenclature?
Răspuns
It omits the copper oxidation state. Copper(I) chloride is CuCl; copper(II) chloride is CuCl₂.
Fișa 30
Întrebare
Name SnO₂ using Stock nomenclature. Oxide is O²⁻.
Răspuns
Tin(IV) oxide. Two oxide ions total −4, so the tin ion is Sn⁴⁺.
Fișa 31
Întrebare
A student labels Fe₂O₃ as iron(II) oxide. Keeping the name iron(II) oxide, what formula should replace it?
Răspuns
FeO. Fe²⁺ and O²⁻ balance in a 1:1 ratio; Fe₂O₃ instead corresponds to iron(III) oxide.
Fișa 32
Întrebare
Name CaCl₂ using the usual introductory fixed-charge convention.
Răspuns
Calcium chloride. Calcium is treated as Ca²⁺, so this convention omits the Roman numeral. An explicit oxidation-state name is not a different compound.
Fișa 33
Întrebare
Write the formula for sodium nitrate using Na⁺ and NO₃⁻.
Răspuns
NaNO₃. One nitrate ion balances one sodium ion; keep the nitrate formula intact.
Fișa 34
Întrebare
Name K₂CO₃. The polyatomic ion CO₃²⁻ is carbonate.
Răspuns
Potassium carbonate. Two K⁺ ions balance one carbonate ion.
Fișa 35
Întrebare
When writing a conventional ionic formula, when do you put a polyatomic ion in parentheses?
Răspuns
When more than one of that whole ion is needed. Put the count outside the parentheses and leave the ion’s internal subscripts unchanged.
Fișa 36
Întrebare
Write the formula for calcium hydroxide using Ca²⁺ and OH⁻.
Răspuns
Ca(OH)₂. Two whole hydroxide ions balance one calcium ion.
Fișa 37
Întrebare
Name NH₄Cl. NH₄⁺ is ammonium.
Răspuns
Ammonium chloride. The cation is the whole NH₄⁺ ion, even though it contains no metal.
Fișa 38
Întrebare
Write the formula for aluminum sulfate using Al³⁺ and SO₄²⁻.
Răspuns
Al₂(SO₄)₃. Two aluminum ions supply +6 and three intact sulfate ions supply −6.
Fișa 39
Întrebare
Name Mg(NO₃)₂. NO₃⁻ is nitrate.
Răspuns
Magnesium nitrate. One Mg²⁺ ion is balanced by two nitrate ions.
Fișa 40
Întrebare
Write the formula for ammonium phosphate using NH₄⁺ and PO₄³⁻.
Răspuns
(NH₄)₃PO₄. Three ammonium ions balance one phosphate ion; only ammonium needs parentheses.
Fișa 41
Întrebare
How many whole hydroxide ions are represented in one formula unit of Ba(OH)₂?
Răspuns
Two hydroxide ions. The outer subscript multiplies the entire OH group, giving two O atoms and two H atoms.
Fișa 42
Întrebare
Name Fe₂(SO₄)₃ using Stock nomenclature. SO₄²⁻ is sulfate.
Răspuns
Iron(III) sulfate. Three sulfate ions total −6, so each of the two iron ions has charge +3.
Fișa 43
Întrebare
Write the formula for calcium nitrate using Ca²⁺ and NO₃⁻.
Răspuns
Ca(NO₃)₂. Two intact nitrate ions supply −2 to balance calcium’s +2.
Fișa 44
Întrebare
Name (NH₄)₂SO₄. NH₄⁺ is ammonium and SO₄²⁻ is sulfate.
Răspuns
Ammonium sulfate. Two ammonium ions balance one sulfate ion.
Fișa 45
Întrebare
Write the formula for magnesium phosphate using Mg²⁺ and PO₄³⁻.
Răspuns
Mg₃(PO₄)₂. Three magnesium ions and two phosphate ions give +6 and −6.
Fișa 46
Întrebare
Name NaHCO₃. HCO₃⁻ is hydrogen carbonate, also called bicarbonate.
Răspuns
Sodium hydrogen carbonate, also called sodium bicarbonate. HCO₃⁻ is one intact anion.
Fișa 47
Întrebare
Repair AlOH₃ as the formula for aluminum hydroxide, using Al³⁺ and OH⁻.
Răspuns
Al(OH)₃. Three whole hydroxide ions are needed. AlOH₃ fails to multiply the oxygen count along with the hydrogen count.
Fișa 48
Întrebare
Write the formula for ammonium sulfite using NH₄⁺ and SO₃²⁻.
Răspuns
(NH₄)₂SO₃. Two ammonium ions balance one sulfite ion; sulfite retains its three oxygen atoms.
Fișa 49
Întrebare
Name Cu(NO₃)₂ using Stock nomenclature. NO₃⁻ is nitrate.
Răspuns
Copper(II) nitrate. Two nitrate ions total −2, requiring Cu²⁺.
Fișa 50
Întrebare
Write the formula for iron(III) sulfate, using sulfate SO₄²⁻.
Răspuns
Fe₂(SO₄)₃. Two Fe³⁺ ions balance three sulfate ions.
Fișa 51
Întrebare
Repair K(CO₃)₂ as the formula for potassium carbonate, using K⁺ and CO₃²⁻.
Răspuns
K₂CO₃. Two potassium ions balance one carbonate ion. A single carbonate group needs no parentheses.
Fișa 52
Întrebare
Can Mg(NO₃)₂ be simplified to MgNO₃ by removing the outer subscript? Use Mg²⁺ and NO₃⁻.
Răspuns
No. The ion ratio is already 1:2. Removing the outer 2 would leave total charge +1 instead of zero.
Fișa 53
Întrebare
Name Ca(OH)₂. OH⁻ is hydroxide.
Răspuns
Calcium hydroxide. The two hydroxide ions balance one Ca²⁺ ion; the ion name stays hydroxide.
Fișa 54
Întrebare
What is the charge on each copper ion in Cu₃(PO₄)₂, taking phosphate as PO₄³⁻?
Răspuns
+2. Two phosphate ions total −6, shared equally among three copper ions as +2 each.
Fișa 55
Întrebare
Write the formula for sodium nitrite using Na⁺ and NO₂⁻.
Răspuns
NaNO₂. One nitrite ion balances one sodium ion. Keep NO₂⁻ intact; NO₃⁻ would be nitrate.
Fișa 56
Întrebare
Repair NH₄SO₄ as the formula for ammonium sulfate, using NH₄⁺ and SO₄²⁻.
Răspuns
(NH₄)₂SO₄. Two whole ammonium ions are required to balance one sulfate ion; the 2 goes outside the ammonium parentheses.
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Ionic Compound Naming Flashcards: Names, Formulas & Charge Balance
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