Question

20 Which of the following match is correct
(a) Last natural element - Uub
(b) General electronic configuration of IA group - ns2
(c) Inert gas elements lies in 2nd -6th period
(d) Typical elements – 3rd period elements​

Answer 1

Answer:

i think it may be b....

hope u will be helped

Answer 2

Answer:

(b) General electronic configuration of IA group - ns² is the correct answer.

Explanation:

(a) Last natural element - Uub

Uub (ununbium) is a synthetic chemical element which is known as Copernicium now.

Last natural element is Francium.

So, this match is incorrect.

(b) General electronic configuration of IA group - ns²

The general electronic configuration of IA group is ns¹ or ns².

So, this match is correct.

(c) Inert gas elements lies in 2nd -6th period

Inert elements lies in 1st-6th period in VII group.

So, this match is incorrect.

(d) Typical elements – 3rd period elements​

Typical elements lies in 1st-2nd period in periodic table namely Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.

So, this match is incorrect.