Question

The atom of an element x has 7 electrons in its m shell. (a) write the electronic configuration of element x. (b)what is the atomic number of element x.(c) is it a metal or non-metal?(d) what type of ion will be formed by an atom of element x? Write the symbol of the ion formed. (e) what could element x be?

Answer 1

A. 2,8,7.

B. 17

C. non metal.

D. anion

E. chlorine.

Answer 2

Answer:

a) Electronic configuration of element X- 2, 8, 7

b) Atomic number of element X- 17

c) Element X is a non-metal.

d) Element X will form an anion. Its ionic symbol is $X^{-}$.

e) Element X is Chlorine.

Explanation:

a) The electronic configuration of the element X is -

K L M

2, 8, 7

The systematic way of writing this electronic configuration will be-

1s² 2s² 2p⁶ 3s² 2p⁵

b) The total number of electrons in an atom is equal to the atomic number of the atom. Element X has total 17 electrons, hence, its atomic number will also be 17.

c) Element X is a non-metal as its outermost electrons are in the p-orbital, and it belongs to P-block.

d) Element X will form an anion as it has 7 electrons in its outermost shell, one electron away from gaining a complete octet. It will gain one electron to obtain a noble gas configuration. Its symbol will be $X^{-}$.

e) Element X is Chlorine.