I am a pure substance, who am I?

What is the formula for aluminum fluoride?

• AlF
• Al₂F₃
• AlF₃
• Al₃F₂

Name the following ionic compound: BeCl₂

• beryllium chlorine

• beryllium II chloride

• beryllium chloride

• beryllium dichloride

beryllium sulfide

• BeS
• Be₂S₂
• BrS
• BrSu

What is the formula for calcium carbonate?

• CaCO
• CaCO₂
• CaCO3
• Ca3CO3

calcium chloride

• CaCl
• Ca₂Cl
• CaCl₂
• ClCa₂

CBr₄

• monocarbon tribromide
• carbon bromine
• carbon tetrabromide
• monocarbon tetrabromide

carbon dioxide 
(you had better get this one right!!)

• CO₂
• C₂O
• CaO₂
• Ca₂O

Name the following ionic compound: Cr(NO₂)₃

• chromium nitrite
• chromium nitride
• chromium III nitride
• chromium III nitrite

The name for CrN:

• Chromium nitride
• Chromium (I) nitride
• Chromium (III) nitride
• Chromium nitride (III)

Name the following ionic compound: Cs₂S

• cesium sulfide

• cesium sulfate

• cesium II sulfate

• cesium II sulfide