GENERAL KNOWLEDGE

Detailed explanation-1: -Both protons and neutrons have a mass of 1, while electrons have almost no mass.

Detailed explanation-2: -The mass number is defined as the total number of protons and neutrons in an atom. The mass number = number of neutrons + atomic number.

Detailed explanation-3: -proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1, 836 times the mass of an electron.

Detailed explanation-4: -The mass of a neutron is roughly equal to 1.008 atomic mass units. When converted into kilograms, the mass of the neutron can be approximated to 1.674*10-27 kg.