Question

Isotopes haveQuestion options:A) different numbers of both protons and neutrons in their nuclei.B) a different number of neutrons in their nuclei.C) a different number of electrons.D) a different number of protons in their nuclei.

Answer 1

B) a different number of neutrons in their nuclei.

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. For example, sodium has eleven protons and is atomic number 11.

Hence, isotopes have a different number of neutrons in their nuclei.

The correct answer is option B) a different number of neutrons in their nuclei.