Answer:
Explanation: As we know that atom was used to be known as the smallest indivisible particle but not now, as they consist of small microscopic particles which are known as electrons , protons and neutrons.
Thus atom consist of protons, neutrons and electrons wherein electrons are negatively charged, protons are positively charged and neutrons are neutral in nature.
Thus in order to understand the nature of element, we must know the number of electrons and protons and neutrons present in that element. Thus this could also help us in understanding the better way of unified atom.
