GENERAL KNOWLEDGE

Detailed explanation-1: -The atomic number is the number of protons in an atom, and isotopes have the same atomic number but differ in the number of neutrons.

Detailed explanation-2: -An element’s or isotope’s atomic number tells how many protons are in its atoms. An element’s or isotope’s mass number tells how many protons and neutrons in its atoms.

Detailed explanation-3: -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.

Detailed explanation-4: -The number of protons in an atom is called its atomic number (Z). This number is very important because it is unique for atoms of a given element. All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms.