Question

How is the mass number calculated for an element? A. The product of neutrons and protons B. There is no calculation. C. The difference between the mass and the protons D. The sum of protons and neutrons

Answer 1

There are number of electrons in a neutral atom is equal to the number ofprotons. The mass number of the atom (M) is equal to the sum of thenumber of protons and neutrons in thenucleus.

Answer 2

To find the mass number of the element, the number of protons and the number of neutrons are added.

The total sum of these gives us the mass number of the element.

Neutrons are neutral in nature and present inside the nucleus while protons are positively charged and rotate around the nucleus.