Writing ionic formulas

What is the correct formula for the compound, lithium oxide?

• LiO
• Li₂O
• LiO₂
• Li₂O₂

Tags

NGSS.MS-PS1-1

What is the formula for manganese(III) oxide?

• MgO
• Mg₂O₃
• MnO
• Mn₂O₃

The formula of calcium phosphate is 

• CaPO₄
• Ca₂(PO₄)₃
• Ca₃PO₄
• Ca₃(PO₄)₂

The chemical formula of Iron (III)bromide is

• FeBr
• Fe(III)Br
• FeBr₃
• Fe₂Br₃

Tags

NGSS.HS-PS1-2

How do the following two elements bond together?
K¹⁺  S^2- 

• KS
• K₈S
• K₆S₃
• K₂S

Tags

NGSS.MS-PS1-1

How do the following two elements bond together?
Cr³⁺  O^2-         

• CrO
• Cr₃O₂
• Cr₂O₃
• CrO₃

Tags

NGSS.MS-PS1-1

Cu ⁺²  and  OH ^-

• CuOH₂
• Cu₂OH
• Cu(OH)₂
• correct answer is not given

Tags

NGSS.MS-PS1-1

What is the correct ionic formula between H⁺ and S^2–?

• H₂S

• HS₂

Tags

NGSS.MS-PS1-1

What is the correct ionic formula between Cu²⁺ and O^2–?

• Cu₂O₂

• Cu_2–O₂₊

• CuO

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

What is the correct ionic formula between Ca²⁺ and N^3–?

• Ca₂N₃

• Ca₃N₂

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1