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