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