GENERAL KNOWLEDGE

Detailed explanation-1: -Atomic number is the number of protons present in the nucleus of an atom of an element. Example: The nucleus of hydrogen atom contains 1 proton and hence, the atomic number of hydrogen is 1. The nucleus of carbon atom has 6 protons and hence, the atomic number of carbon is 6.

Detailed explanation-2: -This discovery was so important to our understanding of atoms that the number of protons in the nucleus of an atom is called the atomic number (Z).

Detailed explanation-3: -The chemical element of an atom is determined by the number of protons, also known as the ‘atomic number (Z)’ of the nucleus. The element oxygen has an atomic number Z=8, while carbon has Z=6. The ‘atomic mass’ of the nucleus is given by A=Z+N, where N is the number of neutrons in the nucleus.

Detailed explanation-4: -atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.