Question

an element has Z is equal to 11 what is the valency of the element also name the element

Answer 1

hey there!!
The element is Na (sodium).
It's valency is +1 (electronic configuration- 2,8,1)

Answer 2

Heya

Your answer is given below
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Atomic number ( z ) = 11

So it is a Sodium metal ( alkali metal )

Its electronic configuration is ==> 2,8,1

So its outer most shell has 1 more electron means its vallency is 1

So your answer is 1

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I hope it will help you

Thanks bhai