Matter Unit Test

Which of the following occurs during the formation of an ionic bond?

• Electrons are gained and lost.
• Electrons are gained only.
• Electrons are lost only.
• Electrons are shared.

Which of these forms when two atoms share electrons?

• an acid
• a covalent bond
• a salt
• an ionic bond

Matter that has a pH of 7 is considered ---

• acidic
• basic
• neutral

In a chemical formula, what do the small numbers (subscripts) tell you?
H₂O

• How many molecules there are.
• How many atoms of an element there are.
• How many elements there are.
• How many subatomic particles there are.

In a chemical formula, what do the big numbers at the front (coefficients) tell you?
2H₂O

• How many molecules there are.
• How many atoms of an element there are.
• How many subatomic particles there are.
• How many elements there are.

The Law of Conservation of Mass states that---

• Matter can be created, but not destroyed without a chemical change.
• Matter is neither created nor destroyed in a physical or chemical change.
• Matter is created and destroyed in a physical or chemical change.
• A chemical change will destroy or create matter, but a physical change will not.

How many nitrogen (N) atoms are in the following chemical formula?
C₇H₆(NO₂)₃

• 1
• 3
• 4
• 2

What is the atomic mass of Neon?

• 10

• 20.18

• 10.18

• 20

How many protons are in Beryllium?

• 4
• 9
• 5
• 2

How many neutrons are in a Gold atom?

• 79
• 196
• 118
• 275