1.

Assertion : In atomic form hydrogen consists of one proton and one electron. Reason : In elemental form hydrogen exists as a diatomic molecule and is called dihydrogen.

Answer»

If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is FALSE.
If both assertion and reason are false.

SOLUTION :Atomic number of hydrogen is 1. Hence it has 1 PROTON. Also for a neutral ATOM, number of protons is equal to the number of electrons hence it has 1 electron. It does not have any NEUTRON.


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