Chemical Formulas & Compounds

When writing the chemical formula of a compound that contains more than one of a particular polyatomic ion, _____ must be used.

• ionic charges

• parenthesis

• Greek prefixes

• lower case letters.

What is the correct name of the compound CaCl₂?

Hint: Is this an ionic compound or a covalent compound?

• Calcium dichloride

• Calcium dichlorine

• Calcium chlorine

• Calcium chloride

What is the correct formula for the compound Phosphorus tribromide?

• P₃Br

• PBr

• PBr₃

• Br₃P

Tags

NGSS.MS-PS1-1

What is the correct formula for Ammonium phosphate?

• NH₄PO₄

• NH₄₃PO₄

• (NH₄)₃PO₄

• NH₄(PO₄)₃

Tags

NGSS.MS-PS1-1

What is the correct name of the compound Mg(NO₃)₂?

• Magnesium nitride

• Magnesium dinitrate

• Monomagnesium dinitrate

• Magnesium nitrate

What is the correct name of the compound NO₂?

• Nitrogen oxide

• Mononitrogen dioxide

• Nitrogen dioxide

• Dinitrogen monoxide

_______ is an ion that contains more than one atom.

• monatomic ion

• complex ion

• polyatomic ion

• diatomic ion

What is the formula for manganese(III) oxide?

• MgO
• Mg₂O₃
• MnO
• Mn₂O₃

Tags

NGSS.HS-PS1-2

Ionic compounds are written with

• cation (+ ion) first then anion (- ion)
• anion (- ion) first then cation (+ ion)
• either way is fine
• polyatomic ions first

What is the formula for sulfuric Acid?

• H₂(SO₃)
• H₂S
• H₂(SO₂)
• H₂SO₄