Question

Which are different forms of an element that have different numbers of neutrons?

ions
isotopes
compounds
molecules
.
.

Answer 1

B
Isotopes because are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element's atomic number on the Periodic Table.

Answer 2

Answer:A

Step-by-step explanation:

Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element's atomic number on the Periodic Table.