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