Explain why, the atomic masses of many elements are in fractions and not whole numbers.

What is the reason for the identical chemical properties of all the isotopes of an element? Explain with the help of an example.

What is the reason for the slightly different physical properties of all the isotopes of an element?

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.