Explain why atoms have different isotopes. In other words, how is it that helium can exist in three different forms?

Answer the question plz

1 Answer
Feb 1, 2018

This is because of the variation of number of neutrons in the nucleus of an atom.


The original atom of helium has 4 as its mass number( 2 protons and 2 neutrons) but in the case of Helium-2, it has 2 protons and no neutrons.