Writing Chemical Formulas

Ionic Compounds

100

Barium Oxide

BaO

200

Magnesium Bromide

MgBr₂

300

Calcium Phosphide

Ca₃P₂

400

Aluminum Sulfide

Al₂S₃

500

Potassium Nitride

K₃N

Transition Metals

100

Lead (III) Nitride

PbN

200

Titanium (I) Sulfide

Ti₂S

300

Copper (IV) Oxide

CuO₂

400

Nickel (II) Phosphide

Ni₃P₂

500

Iron (IV) Fluoride

FeF₄

Polyatomic Ions

100

Ammonium

NH₄⁺

200

Phosphate

PO₄^2-

300

Hydroxide

OH^-

400

Sulfite

SO₃^2-

500

Acetate

C₂H₃O₂^-

Covalent Compounds

100

Dinitrogen Heptoxide

N₂O₇

200

Carbon Monoxide

CO

300

Carbon Decafluoride

CF₁₀

400

Nonanitrogen Tetrachloride

N₉Cl₄

500

Hexafluorine Pentasulfide

F₆S₅

Surprise

100

Sodium Hydroxide

NaOH

200

Cobalt (III) Nitrite

Co(NO₂)₃

300

Zinc Oxide

ZnO

400

Silver Nitrate

AgNO₃

500

Magnesium Acetate

Mg(C₂H₃O₂)₂