Question

A pair of atomic number which belong to s-block are
1)7,15
2)6,12
3)9,17
4)3,12
​

Answer 1

Answer:

option 2 is correct ( 6;12)

Answer 2

Option (4) 3,12

✪ Atomic no. 3 is of Lithium

✪ It's Electronic configuration is 1s2,2s1

✪ Atomic no. 12 is of magnesium

✪ It's Electronic configuration is 1s2,2s2,2p6,3s2