Question

Write the atomic number, mass number, number of protons, number of electrons, number of neutrons, electronic configuration, and valency of the elements given below.
. 7 N 14 , 11 Na 23 , 16 S 32 , 18 Ar 40 .

Answer 1

nitrogen
at no 7
at no 14
no. of el,pr 7
no. of n 7
Na
atmass 23
atno 11
no of el,pr 11
neutron 12
S
m 32
at no 16
pr,el -16
neutron 16

Answer 2

Given:

The atomic representation is provided.

$N^{14} _{7}$, $Na_{11}^{23}$, $S_{16}^{32}$, $Ar_{18}^{40}$

To Find:

The atomic number, mass number, no. of protons and electrons and neutrons, electronic configuration, and valency of given elements.

Solution:

In NITROGEN,

Atomic number = 7

Mass number = no. of protons + no. of neutrons = 14

No. of electrons= 7

No. of neutrons = 7

Electronic configuration = 2, 5

Valency= 3

In SODIUM,

Atomic number = 11

Mass number = no. of protons + no. of neutrons = 23

No. of electrons= 11

No. of neutrons = 12

Electronic configuration = 2, 8, 1

Valency= 1

In SULPHUR,

Atomic number = 16

Mass number = no. of protons + no. of neutrons = 32

No. of electrons= 16

No. of neutrons = 16

Electronic configuration = 2, 8, 6

Valency= 2

In ARGON,

Atomic number = 18

Mass number = no. of protons + no. of neutrons = 40

No. of electrons= 18

No. of neutrons = 22

Electronic configuration = 2, 8, 8

Valency= 0