Chemistry Unit 3 test

This could be the dot diagram of

• Mg

• Cl

• C

• O

How many valence electrons should Lithium have in its Lewis dot model?

• 1

• 2

• 3

• 4

This is a correct dot diagram for nitrogen (N)

• true

• false

This is a correct dot diagram for carbon (C)

• true

• false

Covalent bonds are between...

• Metal and Non-metal

• Non-metal and Non-metal

• Metal and Metal

Ionic bonds are between...

• Metal and Non-metal

• Non-metal and Non-metal

• Metal and Metal

How are covalent bonds formed?

• Sharing of electrons

• Transfer of electrons

Ionic or covalent?

NaBr

• Ionic

• Covalent

Ionic or covalent?

H₂O

• Ionic

• Covalent

Which is most likely to form an ion of -1?

• an element from group 17

• a metal

• an element from group 1

• an element with atoms that have eight valence electrons