Question

A neutral atom possesses 84 protons and 125
neutrons. What will be its mass number?​

Answer 1

Answer:

Allen se ho kya... tallentex de rahe ho kya ??

Step-by-step explanation:

Ans = 209

Answer 2

Mass number of any element (A) = number of protons + number of neutrons
=> Mass number = 84 + 125 = 209