Writing Formulas for Naming Compounds

What is the compound formula for the ions Fe+3 and O-2 ?

• iron oxide

• FeO

• Fe₂O₃

Tags

NGSS.MS-PS1-1

Which of the following formulas represents the harmful gas, carbon monoxide?

• CO

• CO₂

• NO

• SO₂

Name the following covalent compound: CO₂

• carbon dioxide

• carbide oxygen

Tags

NGSS.MS-PS1-1

What is the correct name for SO₂?

• Sulfur oxide

• Sulfite

• Sulfur dioxide

• Sulfur II Oxide

Name the following covalent compound: SO₃

• sulfur oxide

• sulfur trioxide

Tags

NGSS.MS-PS1-1

The chemical formula of Iron (III)bromide is

• FeBr

• Fe(III)Br

• FeBr₃

• Fe₂Br₃

Tags

NGSS.MS-PS1-1

What is the name of Al(NO₃)₃?

• Aluminum trinitrate

• Monoaluminum nitrate

• Aluminum (III) nitrate

• Aluminum Nitrate

The chemical compound for sodium phosphate would be:

• NaPO₄

• Na₂PO₄

• Na₃PO₄

• Na(PO₄)₃

Tags

NGSS.MS-PS1-1

Ionic compounds are written with

• cation (+ ion) first then anion (- ion)

• anion (- ion) first then cation (+ ion)

• either way is fine

• polyatomic ions first

When adding a subscript to a polyatomic ion, you should...

• multiply any subscripts on the polyatomic ion by the subscript you are adding

• put parentheses around the polyatomic ion before adding a subscript

• write the new subscript next to any subscripts on the polyatomic ion

• put the polyatomic ion in square brackets before adding the subscript