Question

definition of isotopes​

Answer 1

Explanation:

Elements are defined by the number of protons in the atomic nucleus. For example, an atom with 6 protons must be carbon, and an atom with 92 protons must be uranium.

In addition to protons, the atoms of nearly every element also contain neutrons. The mass of a neutron is almost identical to that of a proton. Both are formally given an atomic mass number, A, of 1.

Answer 2

Isotopes are atoms of element having same atomic number but different mass number.