Question

The pair of atomic numbes represents s-block elements?


(i) 1 & 15
(ii) 6 & 12
(iii) 9 & 19
(iv) 4 & 12



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Answer 1

Answer:

They have general electron configuration of ns(1−2). Alkali metals have one valence electron whereas alkaline earth metals have two valence electrons. Hence, atomic numbers 4,12 represent s-block elements.

Answer 2

Answer:

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$\red{\textsf{→}}$ Option 4 ( 4 & 12 )

• Group 1 and Group 2 elements are known as s-block elements.

• Hence, the correct answer is Option 4.

Explanation:

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