An element A atomic number 7 mass number 14

B electronic configuration 2, 8, 8

C electrons 13, neutrons 14

D Protons 18 neutrons 22

E electronic configuration 2, 8, 8, 1

State (i) valency of each element (ii) which one is a metal (iii) which is a non-metal (iv) which is an inert gas.

Open in App

Solution

Element A
Atomic number = 7 = Number of electrons = 2, 5
Valency of A =- 3 (Nonmetal)

Element B
Electronic configuration 2, 8, 8
Valency of B = Zero (Inert gas)

Element C has 13 electrons
Electronic configuration = 2, 8, 3
Valency of C = +3 (metal)

Element D
Protons = 18 = Electrons = 2, 8, 8
Valency of D = Zero (inert gas)

Element E
Electronic configuration = 2, 8, 8, 1
Valency of E = +1 (Metal)

C and E are metals.

A is a non-metal.

B and D are inert gases

Suggest Corrections

Similar questions

Write electronic configuration of element $3517$ T.

(a) What is the group number of T?

(b) What is the period number of T?

(d) What is the valency of T?

(e) Is it a metal or a non-metal?

(f) State number of protons and neutrons in T.

The electronic configuration of a dipositive metal $M^{2 +}$ is 2, 8, 14 and its atomic weight is 56 a.m.u. The number of neutrons in its nuclei would be

An atom of an element contains 29 electrons and 35 neutrons. Deduce
(i) the number of protons

(ii) the electronic configuration of the element.

Q. The electrons configuration of a dispositive ion

M^{2 +}

is 2, 8, 14 and its mass number is 56. The number of neutrons present is :

Q. A dipositive ion has an electronic arrangement

2, 8, 8

. Find out the number of electrons, protons and neutrons in that element if its mass number is

40

Join BYJU'S Learning Program

Explore more

Electron Distribution in Orbits

Standard VIII Chemistry

Join BYJU'S Learning Program

An element A atomic number 7 mass number 14 B electronic configuration 2, 8, 8 C electrons 13, neutrons 14 D Protons 18 neutrons 22 E electronic configuration 2, 8, 8, 1 State (i) valency of each element (ii) which one is a metal (iii) which is a non-metal (iv) which is an inert gas.

An element A atomic number 7 mass number 14

B electronic configuration 2, 8, 8

C electrons 13, neutrons 14

D Protons 18 neutrons 22

E electronic configuration 2, 8, 8, 1

State (i) valency of each element (ii) which one is a metal (iii) which is a non-metal (iv) which is an inert gas.