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