Given that the percentage abundance of the isotope is 90% and that of the isotope is 10%, calculate the average atomic mass of neon.

Which of the following are isotopes and which are isobars?

Argon, Deuterium, Calcium, Tritium, Protium

Hydrogen has three isotopes written as:

Explain why:

(i) these isotopes have almost identical chemical properties.

(ii) they are electrically neutral.

What are isobars? Explain with an example.

For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.