Question

Complete the chart:

Name of the element	Symbol of the element	Atomic number	Mass number	No. of protons	No. of electrons	No. of neutrons	Electronic configuration
Nitrogen		7	14				K	L	M

Answer 1

Identify the symbol of Nitrogen:

The chemical symbol of Nitrogen is $\mathrm{N}$.

Calculate the number of protons of Nitrogen:

Number of protons$=$Atomic number

Thus,

Number of protons$=7$

Calculate the number of electrons in Nitrogen:

In a neutral atom,

Number of elecrtons$=$Number of protons

Thus,

Number of elecrtons$=7$

Calculate the number of neutrons in Nitrogen:

Mass number$=$Number of protons$+$Number of neutrons

Thus,

Number of neutrons$=$Mass number$-$Number of protons

Substitute 14 for the mass number and 7 for the number of protons. Thus,

Number of neutrons$=14-7=7$

Write the electronic configuration for Nitrogen:

1. The number of electrons in Nitrogen are $7$.
2. The first $\mathrm{K}$ shell occupies $2$ electrons and the remaining $5$ electrons go to the second $\mathrm{L}$ shell.
3. Thus, the electronic configuration of Nitrogen is $\mathrm{K}=2$, $\mathrm{L}=5$ and $\mathrm{M}=0$.

Thus, the chart is as follows:

Name of the element	Symbol of the element	Atomic number	Mass number	No. of protons	No. of electrons	No. of neutrons	Electronic configuration
Nitrogen	$\mathrm{N}$	$7$	$14$	$7$	$7$	$7$	$\mathrm{K}=2$	$\mathrm{L}=5$	$\mathrm{M}=0$