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