Question

how to calculate velency if we have the deta of electronic communications​

Answer 1

yes we can calculate

for example, oxygen has an atomic number 8 then electric configuration will be 2 , 6 and we have to make the last shell filled. so we will borrow 2 then 2 will be the Valency

Answer 2

$\huge\bold\pink{hello!!}$

HERE IS UR ANSWER

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The number of electrons in outermost shells tells the valency.

• if electrons are 1,2,3 then the valencies will be +1,+2,+3 resp.
• if the electrons are 4 valency is +4 or -4.
• if electrons are 5,6,7 the valency is -3,-2,-1 respectively.
• when electrons are 8 ,the valency is 0 indicating noble gases causing no rxns.