Question

Assertion: James Chadwick discovered the nucleus of an atom. Reason: All the mass of an atom is concentrated in the nucleus.
a) A and R are correct and R is the correct explanation of A

b) A and R are correct but R is not the correct explanation of A

c) A is correct but R is not correct

d) Both A and R are not correct

Answer 1

Explanation:

a is the answer ....

I HOPE THIS HELPS

Answer 2

Explanation:

actually there should be another option

the correct answer is

assertion is false and reason is true

because James chadwick introduced Neutron not nucleus