EVERYDAY SCIENCE

Detailed explanation-1: -The atomic number of an atom is equal to the number of protons in its nucleus. The number of electrons surrounding the nucleus of an atom is equal to the number of protons in its nucleus. Different atoms of the same element can have a different number of neutrons.

Detailed explanation-2: -The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.

Detailed explanation-3: -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-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.

Detailed explanation-5: -The proton number (Z) of an atom is the number of protons it contains. All the atoms of a particular element have the same proton number (number of protons). The atoms of different elements have different numbers of protons. All oxygen atoms have 8 protons and all sodium atoms have 11 protons.