Question

three isotopes of an element have mass number M,(M+1) and(M+2).If the mean number is (M+0.5),then which of the following ratio of number may be accepted forM,M+1 and M+2 in the order

Answer 1

so the answer will be Atomic number(Proton Number)

Answer 2

2)4:1:1

is the answer.

Explanantion:

Average mass = (m + 0.5) = m x 4 + (m+1) x1 + (m+2) x 1

=> (6m+3)/6