Question

The composition of two elements A & B are given below:

Element A B
Protons : 6 6
Neutrons : 6 8
Electrons : 6 6

A. State the atomic number A & B.
B. State the mass number of A & B.
C. State the symbolic representation of A and electronic configuration of
element B.

Answer 1

Explanation :

Atomic mass=number of protons+number of neutrons

Atomic mass of A = 6+6=12

Atomic mass of B =6+8=14

Both X and Y have same atomic number but different atomic mass number so they are isotopes.

Answer :

Option B is correct hope it helps you.