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