Question

Dihydrogen has :

• A. Two isotopes and no isomers.
• B. Three isotopes and two nuclear isomers.
• C. Three isotopes and two optical isomers.
• D. Two isotopes and two geometrical isomers.

Answer 1

Answer: (B)

Three isotopes and two nuclear isomers.

Answer 2

Hydrogen has three isotopes and two isomers.

Protium Deuterium  Tritium Orthohydrogen         Parahydrogen

O Electron-       1          1          1

Proton-  1        1          1

(Isomers of hydrogen)

Neutron-    Nil       1          2

(Isotopes of hydrogen)

Ortho hydrogen-two protons in hydrogen molecule when spins in the same direction the form is termed as orthohydrogen, and when proton spins are in opposite direction the form is known as para hydrogen.