Question

Two statements are given- one labeled Assertion (A) and the other labeled

Reason (R). Select the correct answer to these questions from the (a), (b),

(c) and (d) as given below:

[1]

(a) Both A and R are true, and R is the correct explanation of the assertion.

(b) Both A and R are true, but R is not the correct explanation of the

assertion.

(c) A is true, but R is false.

(d) A is false, but R is true

1. Assertion: Protium, deuterium and tritium are isotopes of hydrogen.

Reason: Isotopes are atoms of same element which have same atomic number

but different mass numbers.​

Answer 1

Answer:

true

Explanation:

make me as a brainlist please plz