Predict Formulas for Stable Binary Ionic Compounds Based on Balance of Charges

What is the formula for magnesium phosphide?

• Mg₃P₂
• Mg₂P₃
• Mg₂PO₃
• Mg₃(PO₃)₂

The chemical formula for an ionic compound of potassium and oxygen is

• KO.
• K₂O.
• K₂O₂.
• KO₂.

Which is most likely to form a negative ion?

• an element from group 17
• a metal
• an element from group 1
• an element with atoms that have eight valence electrons

Tags

NGSS.HS-PS1-1

Name this compound: 
NaBr

• Bromide sodide
• Sodium bromide
• Sodium bromate
• Sodium bromite

SNa₂

• Disodium sulfide

  Disodium sulfide

• Sodium sulfide

• Sodium monosulfide

• Sulfur sodide

What formula results when Ca⁺²  and  Br^- ions bond?

• Ca₂Br₂
• CaBr
• Ca(br)₂
• CaBr₂

What would be the proper chemical formula for combining Al³⁺ and l^- :

• Al l₃
• Al₃l
• Al l
• Al₃ l₃

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

• CrO
• Cr₃O₂
• Cr₂O₃
• CrO₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• KS
• K₈S
• K₆S₃
• K₂S

Tags

NGSS.HS-PS1-2

Li⁺ combines with P^3-  to form

• LiP
• Li₃P
• LiP₃
• Li₃P₃

Tags

NGSS.HS-PS1-7