Bonding

Covalent bonds are formed when_____________.

• electrons are transferred

• electrons are shared

• electrons vanish

• protons absorb electrons

The Octet Rule states that in chemical compounds, atoms tend to have

• the electron configuration of a noble gas

• eight electrons in their valence energy level

• more electrons than protons

• more protons than electrons

Which of the following is a covalent compound?

• BeHCO₃

• MgS

• AgI

• PCl₅

The number of covalent bonds in NH₃ is:

• 2

• 3

• 4

• 5

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A

• B

• C

• D

Which of the following elements can form a triple covalent bond?

• Nitrogen

• Oxygen

• Chlorine

• Potassium

What is the correct Lewis structure for diatomic oxygen, O₂?

• A

• B

• C

• D

• E

Which compound would have a very low melting point?

• sodium chloride

• copper (II) sulfate

• sulfur dioxide

• aluminum

A substance which has a high melting point, conducts electricity when dissolved in water, and has a crystalline structure probably has what type of bond?

• Ionic
• Metallic
• Covalent
• Crystalline

A solid substance is an excellent conductor of electricity. The chemical bonds in this substance are most likely?

• ionic, because the valence electrons are shared between atoms
• covalent, because the valence electrons are mobile
• metallic, because the valence electrons are stationary
• metallic, because the valence electrons are mobile