Alternate Ions Reference Handout

Monatomic Ions

Add to this table the hydrogen ion (H⁺), which is the ion found in acids. Compounds formed from H⁺ and some anion are acids. Consult your notes and the textbook on how to name acids.

Group 1	Group 2	Group 13	Group 14	Group 15	Group 16	Group 17
Li⁺	Be²⁺	B³⁺	—	N^3–	O^2–	F^–
Na⁺	Mg²⁺	Al³⁺	Si⁴⁺	P^3–	S^2–	Cl^–
K⁺	Ca²⁺	Ga³⁺	Ge⁴⁺	As^3–	Se^2–	Br^–
Rb⁺	Sr²⁺	In³⁺	Sn²⁺ / Sn⁴⁺	Sb^3–	Te^2–	I^–
Cs⁺	Ba²⁺	Tl¹⁺ / Tl³⁺	Pb²⁺ / Pb⁴⁺	Bi³⁺ / Bi⁵⁺	—	—

Here is a table of the transition metal ions. Do not memorize charges but be able to figure out the charges from the names or formulas of compounds.

Group 3	Group 4	Group 5	Group 6	Group 7	Group 8	Group 9	Group 10	Group 11	Group 12
Sc 3+	Ti 4+ / 3+ / 2+	V 5+ / 4+ / 3+ / 2+	Cr 6+ / 3+ / 2+	Mn 4+ / 2+ / 3+	Fe 2+ / 3+	Co 2+ / 3+	Ni 2+ / 3+	Cu 2+ / 1+	Zn 2+
Y 3+	Zr 4+							Ag 1+	Cd 2+
La 3+	Hf 4+							Au 3+ / 1+	Hg²⁺ / Hg₂²⁺

Here are some polyatomic ions. Memorize those in bold.

1– Anions
Acetate	C₂H₃O₂^–
Chlorate	ClO₃^–
Chlorite	ClO₂^–
Cyanide	CN^–
Dihydrogen Phosphate	H₂PO₄^–
Hydride	H^–
Hydrogen Carbonate	HCO₃^–
Hydrogen sulfate	HSO₄^–
Hydroxide	OH^–
Hypochlorite	ClO^–
Nitrate	NO₃^–
Nitrite	NO₂^–
Perchlorate	ClO₄^–
Permanganate	MnO₄^–
Thiocyanate	SCN^–

2– Anions
Carbonate	CO₃^2–
Chromate	CrO₄^2–
Dichromate	Cr₂O₇^2–
Hydrogen phosphate	HPO₄^2–
Oxalate	C₂O₄^2–
Selenate	SeO₄^2–
Sulfate	SO₄^2–
Sulfite	SO₃^2–
Thiosulfate	S₂O₃^2–

3– Anions
Arsenate	AsO₄^3–
Borate	BO₃^3–
Phosphate	PO₄^3–

1+ Cation
Ammonium	NH₄¹⁺

This page is useful with the Chemical Nomenclature Group Activity.
Last updated: Apr 25, 2023 Home