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