Question

Physics I’ll give brainiest! :)

Answer 1

Isotope is each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.

It means it has same atomic number but different mass number.

Answer 2

isotopes are the same element, but have different numbers of neutrons (but still have the same number of electrons and protons), hence have a different mass number.