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.

Tags

NGSS.HS-PS1-2

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

NGSS.HS-PS1-2

The name of CaI₂ is

• Calcium iodine
• carbon iodide
• calcium (II) iodide
• calcium iodide

The name of Al₂O₃ is

• aluminum oxide
• aluminum (II) oxide
• aluminum (III) oxide
• dialuminum trioxide

The name of FeCl₂ is

• iron chloride
• iron (II) chloride
• iron (I) chloride
• iron dichloride

The name of Cu₃N₂ is

• copper (III) nitride
• copper (II) nitride
• copper nitride
• tricopper dinitride

Tags

NGSS.HS-PS1-2

The name of Ni₂O₃ is

• nickel (II) oxide
• nickel (III) oxide
• nickle oxide
• dinickel trioxide

How can you tell if it's an ionic compound?

• If it contains a non-metal
• It if contains a metal at the beginning
• If it has a noble gas
• If it shares electrons to make eight

Tags

NGSS.HS-PS1-1

When naming ionic compounds, the cation is always named first and the anion is always named second.

• False
• True