Question

Complete the following.

Sl. No	Name of the element	Symbol	Mass number	Atomic number	Number of protons	Number of electrons	Number of neutrons
1	Nitrogen	___	___	7	___	___	7

Answer 1

Definition of atomic number.

Atomic number is defined as the number of protons present inside the nucleus of an atom.

Atomic number = number of protons = number of electrons

Definition of mass number.

Mass number is defined as the sum of number of protons and number of neutrons present inside the nucleus of an atom.

Mass number = number of protons + number of neutrons.

Given atomic number = 7 and number of neutron =7

Therefore number of protons = Atomic number =number of electrons = 7

Mass number = number of proton + number of neutrons = 14

Hence the symbol is ${}_7{}^{14}\mathrm{N}$

Sl. No	Name of the element	Symbol	Mass number	Atomic number	Number of protons	Number of electrons	Number of neutrons
1	Nitrogen	${}_7{}^{14}\mathrm{N}$	14	7	7	7	7