Question

Define the following form: 

Isotope 

Answer 1

Isotopes are atoms that have the same atomic number but a different mass number. Isotopes have the same numbers of protons but different numbers of neutrons.  

These are some common examples of isotopes:

1.  ²He, 4
2. ²He, 12
3. ⁶C, 14
4. ⁶C, 235
5. ⁹²U, 239
6. ⁹²U, 289