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.
دربارهٔ این دسته
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.
کارتهای این دسته
کارت ۱
پرسش
In a neutral ionic formula unit, what must the total ionic charge be?
پاسخ
Zero. The positive and negative charges must cancel.
کارت ۲
پرسش
When naming a simple ionic compound, which ion is named first?
پاسخ
The cation, followed by the anion.
کارت ۳
پرسش
Write the formula for lithium fluoride using Li⁺ and F⁻.
پاسخ
LiF. One ion of each kind gives +1 − 1 = 0.
کارت ۴
پرسش
In CaCl₂, what does the subscript 2 count?
پاسخ
Two chloride ions for each calcium ion. It does not mean that each chloride ion has a charge of −2.
کارت ۵
پرسش
Name MgO using the usual fixed-charge ionic naming convention.
پاسخ
Magnesium oxide. The ions are Mg²⁺ and O²⁻.
کارت ۶
پرسش
What is the smallest neutral ratio of Al³⁺ ions to O²⁻ ions?
پاسخ
Two Al³⁺ ions to three O²⁻ ions: +6 and −6 cancel.
کارت ۷
پرسش
Write the formula for magnesium bromide using Mg²⁺ and Br⁻.
پاسخ
MgBr₂. Two bromide ions balance one magnesium ion.
کارت ۸
پرسش
Name Na₂S using the usual fixed-charge ionic naming convention.
پاسخ
Sodium sulfide. The sulfur anion is called sulfide.
کارت ۹
پرسش
Write the simplest formula for calcium oxide using Ca²⁺ and O²⁻.
پاسخ
CaO. Equal and opposite charges give a 1:1 ion ratio.
کارت ۱۰
پرسش
Write the formula for aluminum nitride using Al³⁺ and N³⁻.
پاسخ
AlN. One ion of each kind is neutral. Aluminium nitride is the same compound, with the British spelling.
کارت ۱۱
پرسش
Name Mg₃N₂ using the usual fixed-charge ionic naming convention.
پاسخ
Magnesium nitride. Three Mg²⁺ ions balance two N³⁻ ions.
کارت ۱۲
پرسش
Write the formula for lithium oxide using Li⁺ and O²⁻.
پاسخ
Li₂O. Two lithium ions balance one oxide ion.
کارت ۱۳
پرسش
Name CaF₂ using the usual fixed-charge ionic naming convention.
پاسخ
Calcium fluoride. This convention uses the ion names without a di- prefix for the two fluoride ions.
کارت ۱۴
پرسش
A student writes Mg₂O₂ for magnesium oxide, using Mg²⁺ and O²⁻. What is the simplest formula?
پاسخ
MgO. The 2:2 ion ratio is neutral but reduces to 1:1.
کارت ۱۵
پرسش
Name Al₂S₃ using the usual fixed-charge ionic naming convention.
پاسخ
Aluminum sulfide (also spelled aluminium sulfide). Two Al³⁺ ions balance three S²⁻ ions.
کارت ۱۶
پرسش
Write the formula for sodium phosphide using Na⁺ and P³⁻.
پاسخ
Na₃P. Three sodium ions balance one phosphide ion.
کارت ۱۷
پرسش
Name LiF using the usual fixed-charge ionic naming convention.
پاسخ
Lithium fluoride. Name the lithium cation first and the fluoride anion second.
کارت ۱۸
پرسش
Write the formula for magnesium oxide using Mg²⁺ and O²⁻.
پاسخ
MgO. The smallest neutral ratio is one magnesium ion to one oxide ion.
کارت ۱۹
پرسش
In the Stock name iron(III) chloride, what does III specify?
پاسخ
A +3 charge on each iron ion. For this monatomic ion, its charge equals its oxidation state; III is not an atom count.
کارت ۲۰
پرسش
Name FeCl₂ using Stock nomenclature. Chloride is Cl⁻.
پاسخ
Iron(II) chloride. Two chloride ions total −2, so the iron ion is Fe²⁺.
کارت ۲۱
پرسش
What is the charge on each copper ion in Cu₂O, taking oxide as O²⁻?
پاسخ
+1. The two copper ions together must supply +2, so each is Cu⁺.
کارت ۲۲
پرسش
Write the formula for tin(IV) oxide, using oxide O²⁻.
پاسخ
SnO₂. One Sn⁴⁺ ion balances two oxide ions; reduce a crossed 2:4 ratio to 1:2.
کارت ۲۳
پرسش
Name Fe₂O₃ using Stock nomenclature. Oxide is O²⁻.
پاسخ
Iron(III) oxide. Three oxide ions total −6; divided between two iron ions, that requires Fe³⁺.
کارت ۲۴
پرسش
Write the formula for copper(II) bromide, using bromide Br⁻.
پاسخ
CuBr₂. One Cu²⁺ ion needs two bromide ions.
کارت ۲۵
پرسش
Name SnCl₂ using Stock nomenclature. Chloride is Cl⁻.
پاسخ
Tin(II) chloride. Two Cl⁻ ions require one Sn²⁺ ion.
کارت ۲۶
پرسش
Write the formula for iron(II) chloride, using chloride Cl⁻.
پاسخ
FeCl₂. One Fe²⁺ ion balances two chloride ions.
کارت ۲۷
پرسش
Name CuO using Stock nomenclature. Oxide is O²⁻.
پاسخ
Copper(II) oxide. The 1:1 ratio requires Cu²⁺ to balance O²⁻.
کارت ۲۸
پرسش
Write the formula for iron(III) sulfide, using sulfide S²⁻.
پاسخ
Fe₂S₃. Two Fe³⁺ ions supply +6 and three sulfide ions supply −6.
کارت ۲۹
پرسش
Why is the name copper chloride insufficient to choose a single formula in introductory Stock nomenclature?
پاسخ
It omits the copper oxidation state. Copper(I) chloride is CuCl; copper(II) chloride is CuCl₂.
کارت ۳۰
پرسش
Name SnO₂ using Stock nomenclature. Oxide is O²⁻.
پاسخ
Tin(IV) oxide. Two oxide ions total −4, so the tin ion is Sn⁴⁺.
کارت ۳۱
پرسش
A student labels Fe₂O₃ as iron(II) oxide. Keeping the name iron(II) oxide, what formula should replace it?
پاسخ
FeO. Fe²⁺ and O²⁻ balance in a 1:1 ratio; Fe₂O₃ instead corresponds to iron(III) oxide.
کارت ۳۲
پرسش
Name CaCl₂ using the usual introductory fixed-charge convention.
پاسخ
Calcium chloride. Calcium is treated as Ca²⁺, so this convention omits the Roman numeral. An explicit oxidation-state name is not a different compound.
کارت ۳۳
پرسش
Write the formula for sodium nitrate using Na⁺ and NO₃⁻.
پاسخ
NaNO₃. One nitrate ion balances one sodium ion; keep the nitrate formula intact.
کارت ۳۴
پرسش
Name K₂CO₃. The polyatomic ion CO₃²⁻ is carbonate.
پاسخ
Potassium carbonate. Two K⁺ ions balance one carbonate ion.
کارت ۳۵
پرسش
When writing a conventional ionic formula, when do you put a polyatomic ion in parentheses?
پاسخ
When more than one of that whole ion is needed. Put the count outside the parentheses and leave the ion’s internal subscripts unchanged.
کارت ۳۶
پرسش
Write the formula for calcium hydroxide using Ca²⁺ and OH⁻.
پاسخ
Ca(OH)₂. Two whole hydroxide ions balance one calcium ion.
کارت ۳۷
پرسش
Name NH₄Cl. NH₄⁺ is ammonium.
پاسخ
Ammonium chloride. The cation is the whole NH₄⁺ ion, even though it contains no metal.
کارت ۳۸
پرسش
Write the formula for aluminum sulfate using Al³⁺ and SO₄²⁻.
پاسخ
Al₂(SO₄)₃. Two aluminum ions supply +6 and three intact sulfate ions supply −6.
کارت ۳۹
پرسش
Name Mg(NO₃)₂. NO₃⁻ is nitrate.
پاسخ
Magnesium nitrate. One Mg²⁺ ion is balanced by two nitrate ions.
کارت ۴۰
پرسش
Write the formula for ammonium phosphate using NH₄⁺ and PO₄³⁻.
پاسخ
(NH₄)₃PO₄. Three ammonium ions balance one phosphate ion; only ammonium needs parentheses.
کارت ۴۱
پرسش
How many whole hydroxide ions are represented in one formula unit of Ba(OH)₂?
پاسخ
Two hydroxide ions. The outer subscript multiplies the entire OH group, giving two O atoms and two H atoms.
کارت ۴۲
پرسش
Name Fe₂(SO₄)₃ using Stock nomenclature. SO₄²⁻ is sulfate.
پاسخ
Iron(III) sulfate. Three sulfate ions total −6, so each of the two iron ions has charge +3.
کارت ۴۳
پرسش
Write the formula for calcium nitrate using Ca²⁺ and NO₃⁻.
پاسخ
Ca(NO₃)₂. Two intact nitrate ions supply −2 to balance calcium’s +2.
کارت ۴۴
پرسش
Name (NH₄)₂SO₄. NH₄⁺ is ammonium and SO₄²⁻ is sulfate.
پاسخ
Ammonium sulfate. Two ammonium ions balance one sulfate ion.
کارت ۴۵
پرسش
Write the formula for magnesium phosphate using Mg²⁺ and PO₄³⁻.
پاسخ
Mg₃(PO₄)₂. Three magnesium ions and two phosphate ions give +6 and −6.
کارت ۴۶
پرسش
Name NaHCO₃. HCO₃⁻ is hydrogen carbonate, also called bicarbonate.
پاسخ
Sodium hydrogen carbonate, also called sodium bicarbonate. HCO₃⁻ is one intact anion.
کارت ۴۷
پرسش
Repair AlOH₃ as the formula for aluminum hydroxide, using Al³⁺ and OH⁻.
پاسخ
Al(OH)₃. Three whole hydroxide ions are needed. AlOH₃ fails to multiply the oxygen count along with the hydrogen count.
کارت ۴۸
پرسش
Write the formula for ammonium sulfite using NH₄⁺ and SO₃²⁻.
پاسخ
(NH₄)₂SO₃. Two ammonium ions balance one sulfite ion; sulfite retains its three oxygen atoms.
کارت ۴۹
پرسش
Name Cu(NO₃)₂ using Stock nomenclature. NO₃⁻ is nitrate.
پاسخ
Copper(II) nitrate. Two nitrate ions total −2, requiring Cu²⁺.
کارت ۵۰
پرسش
Write the formula for iron(III) sulfate, using sulfate SO₄²⁻.
پاسخ
Fe₂(SO₄)₃. Two Fe³⁺ ions balance three sulfate ions.
کارت ۵۱
پرسش
Repair K(CO₃)₂ as the formula for potassium carbonate, using K⁺ and CO₃²⁻.
پاسخ
K₂CO₃. Two potassium ions balance one carbonate ion. A single carbonate group needs no parentheses.
کارت ۵۲
پرسش
Can Mg(NO₃)₂ be simplified to MgNO₃ by removing the outer subscript? Use Mg²⁺ and NO₃⁻.
پاسخ
No. The ion ratio is already 1:2. Removing the outer 2 would leave total charge +1 instead of zero.
کارت ۵۳
پرسش
Name Ca(OH)₂. OH⁻ is hydroxide.
پاسخ
Calcium hydroxide. The two hydroxide ions balance one Ca²⁺ ion; the ion name stays hydroxide.
کارت ۵۴
پرسش
What is the charge on each copper ion in Cu₃(PO₄)₂, taking phosphate as PO₄³⁻?
پاسخ
+2. Two phosphate ions total −6, shared equally among three copper ions as +2 each.
کارت ۵۵
پرسش
Write the formula for sodium nitrite using Na⁺ and NO₂⁻.
پاسخ
NaNO₂. One nitrite ion balances one sodium ion. Keep NO₂⁻ intact; NO₃⁻ would be nitrate.
کارت ۵۶
پرسش
Repair NH₄SO₄ as the formula for ammonium sulfate, using NH₄⁺ and SO₄²⁻.
پاسخ
(NH₄)₂SO₄. Two whole ammonium ions are required to balance one sulfate ion; the 2 goes outside the ammonium parentheses.
۵۶ کارت
Ionic Compound Naming Flashcards: Names, Formulas & Charge Balance
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