Question

For element x, it is given that atomic no. Is 17 and mass no. Is 35 write the electronic configuration of element x. And find the valancy and also write formula of compound formed between x and y where valency of y is 3

Answer 1

Atomic number is 17 then electronic configuration is 2,8,7 or 1s2,2s2 2p6, 3s2 3p5

Valance will be 1 of x element
And compound formed between x and y is Alcl3 it may be i think

I m not sure what is the compound formed because i m a maths sudent and i left my chemistry in 12th after that i only study math