Question

An atom has electric configuration 2,8,7.
a)what is the atomic no.of this element?
b)to which of the following elements would it be chemically similar.
N(7). F(9). P(15). Ar(18)

Answer 1

Answer:

1) 17

2) F

Explanation:

hope this helps you..

Answer 2

a. 17

b. Ar(18) i think

hope it helped and I also think there is a small mistake in the question :)