Question

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HOW CAN WE CALCULATE THE VALENCY BY ELECTRONIC CONFIGURATION

Answer 1

Answer:

it's simple.

let's take an example of oxygen

so atomic no. of oxygen is 8

now in electronic configuration we do minus with the atomic no. of any element

so according to scientists we have to minus with 2 from 8

so 8-2 = 6

now minus with 8 but only 6 electrons are left

so it's valency will be 2 because oxygen needs 2 electrons more to complete it shell

so the valency will be 2

in this way we can calculate the valency

hope you understand plz thank my answer

Answer 2

Answer:

number of electrons present in the outermost shell. It strives to gain octet. If the number of electrons is 5 ,6, 7 than valency will be 3,2,1 respectively. carbon is so cool element