Covalent bond intro

Valence electrons are shared

• Ionic bonds

• Covalent bonds

What type of bonding does this picture show?

• Ionic

• Covalent

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Why do all bonds form?

• so the number of protons equals the number of electrons

• so an atom can become unstable

• to fill the outermost energy level

How do covalent bonds form?

• Donating & receiving valence e- between atoms.
• Opposite slight charges attract each other between compounds.
• Scientists are still not sure how they form.
• Sharing valence e- between atoms.

Which of the following is NOT formed by a covalent bond?

• K₂S
• H₂O
• I₂
• CO₂

A Nitrogen molecule (N2) has one triple bond. How many electrons do the nitrogen atoms share?

• 1
  1
• 3
• 4
• 6