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