Question

an atom has electronic configuration 2,8,7,
what is the atomic number of this element
to which of the following elements would it be chemically similar ​

Answer 1

Answer:

As the electronic configuration of the given atom is 2,8,7 it is inferred that the atomic number of element is 17 (2+8+7). Thus element with atomic number 17 is Chlorine. Among the options given which includes Nitrogen, Fluorine, Phosphorus and Argon, chlorine is chemically similar to fluorine.

Explanation:

Answer 2

Answer:

As the electronic configuration of the

given atom is 2,8,7 it is inferred that the

atomic number of element is 17 (2+8+7).

Thus element with atomic number 17 is

Chlorine.

Among the options given which

includes Nitrogen, Fluorine, Phosphorus

and Argon, chlorine is chemically similar

to fluorine.

It is because chlorine and Fluorine

belongs to same group 17 and they are

called as halogens.

Other elements such as Nitrogen,

Phosphorus and Argon are not

halogens.