Chemical formulas!

What molecule is shown?

• CO₂

• NH₄

• H₂O

• O₂H

What molecule is shown?

• NH₄

• N₁H₄

• N₁H₃

• NH₃

How many covalent bonds does carbon make with other atoms?

• 1

• 2

• 3

• 4

How many covalent bonds does Helium make with other atoms?

• 0

• 1

• 2

• 6

What is the name for elements that do not chemically react with others?

• inert

• introverted

• isolated

• innate

What happens in a covalent bond?

• atoms share protons

• atoms share electrons

• atoms take on electrical charge

• atoms repel one another

How many electrons are in the outer shell of Neon?

• 0

• 2

• 4

• 8

How many electrons do atoms other than Hydrogen and Helium "want" in their outer shell to be stable?

• 0

• 4

• 8

• 16

Which of these is true for both carbon (C) and silicon (Si)?

• They both have four protons

• They both have four electrons in their outer shell

• They both are semiconductors

• They both form graphite and diamonds

Which of these does NOT contain carbon?

• coal

• diamonds

• graphite

• salt