Answer to Question 1

There are 2 electrons as the proton number for helium is 2. We need to take away the mass of two electrons Nuclear mass = 3.016030 u – (2 ´ 0.000549 u) = 3.014932 u

There are 2 electrons as the proton number for helium is 2.

We need to take away the mass of two electrons

Nuclear mass = 3.016030 u – (2 ´ 0.000549 u) = 3.014932 u