Common Ions

Common Ions (Know these) Flash Card Link to Quizlet List
Cations	Symbol	Memorization Aide	Anions	Symbol	Memorization Aide
hydrogen	H⁺¹	Periodic table	fluoride	F^-1	Periodic table
lithium	Li⁺¹	Periodic table	chloride	Cl^-1	Periodic table
sodium	Na⁺¹	Periodic table	bromide	Br^-1	Periodic table
potassium	K⁺¹	Periodic table	iodide	I^-1	Periodic table
magnesium	Mg⁺²	Periodic table	sulfide	S^-2	Periodic table
calcium	Ca⁺²	Periodic table	oxide	O^-2	Periodic table
barium	Ba⁺²	Periodic table	peroxide	O₂^-2	polyatomic
strontium	Sr⁺²	Periodic table	acetate	C₂H₃O₂^-1 ^Or CH₃COO^-1	polyatomic
aluminum	Al⁺³	Periodic table	acetate	C₂H₃O₂^-1 ^Or CH₃COO^-1	polyatomic
silver	Ag⁺¹	transitional (many times multi-valent ions possible)	hydroxide	OH^-1	polyatomic
copper (I)	Cu⁺¹	transitional	chlorate	ClO₃^-1	polyatomic
copper (II)	Cu⁺²	transitional	nitrate	NO₃^-1	polyatomic
cobalt (II)	Co⁺²	transitional	nitrite	NO₂^-1	polyatomic
lead (II)	Pb⁺²	transitional	permanganate	MnO₄^-1	polyatomic
nickel (II)	Ni⁺²	transitional	carbonate	CO₃^-2	polyatomic
zinc	Zn⁺²	transitional	hydrogen carbonate	HCO₃^-1	polyatomic
iron(II)	Fe⁺²	transitional	sulfite	SO₃^-2	polyatomic
iron (III)	Fe⁺³	transitional	sulfate	SO₄^-2	polyatomic
chromium (III)	Cr⁺³	transitional	hydrogen sulfate	HSO₄^-2	polyatomic
ammonium	NH₄⁺¹	polyatomic	chromate	CrO₄^-2	polyatomic
ammonium	NH₄⁺¹	polyatomic	phosphate	PO₄^-3	polyatomic

Note: The charges may be represented as X⁺¹ or X¹⁺ We chose to indicate as above to use the charge as a separation between the symbol and its charge. Remember + charges mean a deficit of electrons. - charges mean a surplus