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
Silicon			28		14		K = 2	L = 8	M = 4

Answer 1

Identify the chemical symbol of Silicon:

The chemical symbol of silicon is $\mathrm{Si}$

Calculate the atomic number of Silicon:

In a neutral atom,

Atomic number = Number of electrons = number of protons

Thus,

Atomic number = 14

Number of protons = 14

Calculate the number of neutrons:

Mass number = number of protons + number of neutrons

Thus,

Number of neutrons = Mass number - Number of protons $=28-14=14$

Hence, the complete table is given 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
Silicon	Si	14	28	14	14	14	K = 2	L = 8	M = 4