Question

(d)
Match the atomic number 4, 6, 11, 15 and 18 with each of the following:
(0) A solid non-metal of valency 3.
(ii) A gas belonging to zero group.
(iii) An element with 2 electrons in the valence shell.
(iv) A non-metal of valency 4.
(v) A metal with one electron in the third shell.​

Answer 1

Answer:

(i) At. No. Of Element 15

(ii) At. No. 18

(iii) At. No 4

(iv) At. No. 6

(v) At. No. 11

Explanation:

(i) The Electronic Configuration of Element having At. No. 15 is (2,8,5) having the Valency 3

(ii) The Element Belonging to the Inert Gases Group or the Zero Group is Element Having At. No. 18

(iii) The Electronic Configuration of Element Having At. No. 4 is (2,2) Having Valence Electrons 2

(iv) Carbon Having Atomic No. 6 is A Non-Metal with Valency 4

(v) The Electronic Configuration of Element Having Atomic No. 11 is (2,8,1) Having 1 e- in the Third or M shell.

Answer 2

Phosphorus - A solid non-metal of valency 3

Explanation:

(i)  Phosphorus - A solid non-metal of valency 3.

• Atomic No. = 15

• Electronic Configuration = (2,8,5)

(ii) Argon  - The element belonging zero group also known as inert gas.

• Atomic No. = 18

• Electronic Configuration of Element = (2,8,8)

(iii) Beryllium - An element with 2 electrons in the valence shell.

• Atomic No. = 4

• Electronic Configuration of Element = (2,2)

Valence Electrons 2

(iv) Carbon - A non-Metal with Valency 4  

• Atomic No. = 6

• Electronic Configuration- (2,4)

(v) Sodium - A metal with one electron in the third shell. or M shell.

• Atomic No. = 11

• Electronic Configuration = (2,8,1)