The number of which of the following particles will differ f

The number of which of the following particles will differ for each isotope of the same element?

a. Electrons orbiting its nucleus

b. Neutrons orbiting its nucles

c. Ions that it can produce

d. Neutrons in its nucleus

Solution

The answer is: d. Neutrons in its nucleus.

Isotopes of same element have different neutrons but same number of electrons. Neutrons are inside the nucleus and do not orbit the nucleus like electrons.