Question

When scientists look at these examples, what do they know about the atoms?

Carbon–12 Carbon–14

A.
The number of neutrons in each atom is not the same.

B.
The atoms have different properties.

C.
One atom has more protons than the other.

D.
Only one of the examples is an isotope.

Answer 1

The answer is A.

B and C are incorrect because both atoms are Carbon, they have the same properties and therefore have the same number of protons.

D is incorrect because both atoms are isotopes, they have the same number of protons but a different number of neutrons