Question

2) Atomic mass number is a whole number.

3) School bags have broad shoulder straps​

Answer 1

Answer:

2)Atomic number and mass number are always whole numbers because they are obtained by counting whole objects (protons, neutrons, and electrons). The sum of the mass number and the atomic number for an atom (A-Z) corresponds to the total number of subatomic particles present in the atom.

3)School bags have broader straps so that the pressure exerted on our shouldr will be less. The pressure exerted by the straps on our shoulders will be divided on the surface of the straps. So when the straps are broader, the pressure is divided more, hence the pressure on our shoulders decreases.