Question

write the electronic configuration of element with atomic number 17 indicate the valency of ​

Answer 1

Answer:

ELECTRONIC CONFIGURATION= 2,8,7

VALENCY = 8-7 = 1

Answer 2

Its valency is 1.

• The element with the atomic number 17 is Chlorine. It has the symbol of Cl. It is a halogen.
• The electronic configuration of the Cl atom is as follows-
• ${1s}^{2} {2s}^{2} {2p}^{6} {3s}^{2} {3p}^{5}$
• It has five electrons in its 3p orbital. Hence it needs one electron more to complete its octet and get higher stability. So, Cl shows the valency of 1.