Question

question : what are isotopes

Answer 1

They are two or more atoms that have the same atomic number and position on the periodic table. For example; two or more forms of an element have the same number of protons but different numbers for neutrons.

Answer 2

Answer:    

Isotopes are versions of the same element. They have the same number of protons and electrons as the element but different mass numbers and number of neutrons.

Explanation:  

one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table.