Question

Find the valency of 4/2he and 14/7n

Answer 1

Answer:

he=o as its a noble gas and has completed its duplet

and n= -3

as its electronic configuration is

n=2,5

so to complete its octate it needs 3 more electron. so it will take 3 electrons and get the negative-3 charge.

Answer 2

The valency of ⁴₂He and ¹⁴₇N are 0 and -3 respectively.

• The valency is defined as the combining capacity of an atom to complete its octet and attain the noble gas configuration.
• The He atom is a noble gas. Its electronic configuration is 2.
• He has completed its duplet.
• It does not require any electron to attain a stable configuration as it already has a stable electronic configuration, so the valency of He is 0.
• The electronic configuration of N is 2,5.
• It requires 3 more electrons to attain a noble gas stable electronic configuration.
• It will gain 3 electrons so the charge will be -3, so the valency of N is -3.

Hence, the valency of ⁴₂He and ¹⁴₇N are 0 and -3 respectively.