Covalent Bonding Mastery Test

The octet rule states that atoms will tend to gain, lose, or share electrons in order to have how many valence electrons in their outer shell?

• 0
• 4
• 8
• 10

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements is an exception to the octet rule?

• hydrogen

• oxygen

• nitrogen

• fluorine

Noble gases rarely react or bond with other elements due to their magic number of valence electrons. How many valence electrons do noble gases such as Krypton have?

• 4
• 8
• 18
• 36

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What do the lines on the covalent structures represent? Choose the best answer.

• protons
• neutrons
• bonded electrons

How many bonds will argon (Ar) form with other nonmetals?

• 1

• 2

• 3

• None, argon is a noble gas and already has a full valence shell

• 4

Tags

NGSS.HS-PS1-1

A covalent/molecular compound is formed from _______.

• two metals
• two nonmetals
• a metal and a nonmetal
• any combination of metal or nonmetal

An ionic compound is formed from _______.

• two metals
• two nonmetals
• a metal and a nonmetal
• any combination of metal or nonmetal

"Acid rain" is a broad term referring to a mixture of wet and dry deposition (deposited material) from the atmosphere containing higher than normal amounts of nitric and sulfuric acids. In the United States, roughly 2/3 of all SO2 comes from electric power generation that relies on burning fossil fuels, like coal. Acid rain occurs when these gases react in the atmosphere with water, oxygen, and other chemicals to form various acidic compounds. What is the chemical name of SO2?

• sulfur oxygen
• sulfur dioxide
• sulfur oxide
• monosulfur dioxide

What is the name of the molecular compound N2H4?

• nitrogen hydride
• dinitrogen hydride
• dinitrogen tetrahydride
• nitrogen tetrahydride

Match the number of covalent bonds formed to the element

• 3

• carbon

• 2

• hydrogen / halogens

• 4

• oxygen

• 1

• nitrogen