Chemistry Midterm Exam

What element contains 8 protons?

• Argon

• Nitrogen

• Oxygen

• Uranium

What element contains 42 protons?

• Gold

• Iron

• Oxygen

• Molybdenum

What element is this atom?

• Copper

• Carbon

• Helium

• Plutonium

Which of the following would be true about a neutral atom of sodium? (there is more than one right answer).

• It would contain 22 protons

• It would contain 11 protons

• It would contain 22 electrons

• It would contain 11 electrons

What charge do neutrons have?

• Positive

• Negative

• Neutral

• Depends on their environment

What charge do protons have?

• Positive

• Negative

• Neutral

• Depends on their environment

What charge do electrons have?

• Positive

• Negative

• Neutral

• Depends on their environment

How many electrons does this element have it its outer shell?

• 7

• 2

• 5

• 18

What is the valence shell of an atom?

• The electron shell closest to the nucleus

• The electron shell farthest from the nucleus

• The electron shell that has the most electrons in it.

• The electron shell that is empty.

Generally speaking, how many electrons do atoms "want" to have in their valence shell?

• 8

• 1

• 14

• 22