Question

The electronic configurations of some elements is given below. With the help of provided electronic configuration, answer the following questions.

A = 1s², 2s², 2p⁶, 3s¹

B = 1s², 2s², 2p⁶, 3s², 3p⁶, 4s¹

C = 1s⁷, 2s², 2p⁵

D = 1s², 2s², 2p⁶, 3s², 3p⁵

1. Write the valency, period number, group number and block of the elements given above.

2. Which element is more reactive, C or D?​

Answer 1

1

A. valency=1 ,period number=3,group no=1,and bock of A=S block

B.valency=1, period number=4,group no=1 and block of B = S block

C. valency=1 ,period number=2,group no.=17and block of C= p block

D. valency=1 , period number=3, group no.=17and block of D = p block

2..

C is most reactive