Question

Army please help me in this answer​

Answer 1

Explanation:

ans1=Element Symbols Electrons Protons Neutrons

Hydrogen H 1 1 0

Deuterium D 1 1 1

Tritium T 1 1 2

H, D and T are the three isotopes of hydrogen with same atomic number and different mass numbers of 1, 2 and 3 respectively.

Concept insight: Recall the mass numbers of each of the isotopes.