Question

What are isotopes? Write three isotopes of hydrogen.

Answer 1

Isotopes:

1. Different forms of an element having the same atomic number but a different mass number.
2. They have an equal number of protons.
3. Number of neutrons is different in isotopes.
4. They have similar chemical properties but different physical properties.
5. Example : ${}_6{}^{12}\mathrm{C}\mathrm{and}{}_6{}^{13}\mathrm{C}\mathrm{are}\mathrm{the}\mathrm{isotopes}\mathrm{of}\mathrm{carbon}.$

Three isotopes of Hydrogen:

${}_1{}^1\mathrm{H}\left(\mathrm{Hydrogen}\right),{}_1{}^2\mathrm{H}\left(\mathrm{deuterium}\right),{}_1{}^3\mathrm{H}\left(\mathrm{tritium}\right)$