Question

how to find the valency of electron​

Answer 1

Answer:

If the number of electrons in the outer shell is between one to four, the compound is said to have positive valency. For compounds with electrons four, five, six, or seven, the valency is determined by subtracting the electron from eight. All noble gases except for Helium have eight electrons.

Explanation:

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Answer 2

Answer:

valency 1 for chlorine

Explanation:

0=8

1=7

2=6

3=5

4=4

cl-17-1s2/2s2 2p6/3s2 3p5

now add the numbers in outer most shell

i.e.,5+2=7

1=7

so the valency is 1.