Explanation:

- Option 1: Isotopes

- Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons in their nuclei.

Your Answer is Right

- Option 2: Isotrones

- The term "isotrones" is not a standard concept in chemistry and likely does not exist in relation to elements with varying neutron numbers.

- Option 3: Isobars

- Isobars are elements that have the same mass number (sum of protons and neutrons) but different atomic numbers (different numbers of protons/neutrons).

- Option 4: Isotones

- Isotones are elements that have the same number of neutrons but different numbers of protons.

In summary, isotopes are the correct term for elements that share the same number of protons but differ in neutron count.