Chemistry Test: Covalent Bonds & Lewis Dot Structures

Which is the correct Lewis dot structure for the molecule fluorine, F₂?

• A

• B

• C

• D

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

How many electrons should argon have around its Lewis dot model?

• 5

• 6

• 7

• 8

Which type of bond is formed by the sharing of electrons?

• Ionic

• Covalent

• Metallic

How are ionic bonds formed?

• transfer of electrons

• sharing of electrons

This is the correct dot diagram for sodium (Na)

• true
• false

This is the correct dot diagram for nitrogen (N)

• true
• false

What is the correct formula for this molecule?

• Si₄F
• SiF₄
• SiF
• Si₄F₄

What 2 types of atoms make a covalent bond?

• 2 metals

• 2 noble gases

• 2 nonmetals

• 1 metal & 1 nonmetal

Covalent compounds

• contain a sea of electrons

• share electrons

• transfer electrons

• conduct electricity