Question

OR
Atomic number of an element Y is 17
(a ) write its electronic configuration
(b ) what is the number of valence electron in Y
(c) How many electron are needed to complete the octet of Y
(d) Is it metal or non metal
(e ) write the name of the element​

Answer 1

Answer:

a) electronic configuration - 2,8,7

Explanation:

b) valence electrons - 7

c) 1 electron is needed to complete octet

d)It is non metal

e) Cl- chlorine