Question

17. What's mass?
A. A measure of an element's attraction for electrons
B. The force that gravity exerts upon an object
C. The sum of the number of protons and neutrons in an atom
D. A measure of the amount of matter an object contains

Answer 1

Answer:

The force that gravity exerts upon an object.

Answer 2

The answer is D
A measure of the amount of matter an object contains is mass