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