Question

isotopes worksheet

1. what is an isotope?
2. what does the number next to isotopes signify?
3. how can you tell isotopes apart?

Explanation:

1. Isotopes are atoms of the same element with different numbers of neutrons.
2. The number next to isotopes (mass number) signifies the sum of protons and neutrons in the nucleus.
3. Isotopes can be told apart by their mass numbers (due to different neutron counts).

Answer:

1. Atoms of the same element with different neutron numbers.
2. The sum of protons and neutrons (mass number).
3. By their mass numbers (different neutron counts).