Question

atomic number of few elements are given below while pair belong to s-blocks elements
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Answer 1

The pair of atomic numbers 3 and 12 represents elements which belong to s block.

Answer 2

Answer:

Atomic numbers 3, 20 belongs to s-block.

The element with Z=3 and electronic configuration 1s

2

2s

1

; is an alkali metal.

The element with Z=20 and electronic configuration 1s

2

2s

2

2p

6

3s

2

3p

6

4s

2

is an alkaline earth metal.

Explanation:

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