Question

An atom of an element X has 2 electrons in its N shell.
(i) State its electronic configuration
(ii) Is it a metal or non-metal ?
(iii) State the number of protons in X.
(iv) Write the formula of its chloride.
(v) Where is this element placed in the periodic table ?​

Answer 1

Answer:

1) K L M N

2 8 8 2

2) it is a metal.

3) no of protons in x is 20.

4) formula of its chloride is CaCl2

5) at 20th no.

.

hope it helps you. plss mark as brainliest.

Answer 2

Given that,

An atom of an element X has 2 electrons in its N shell.

To find,

From (i) to (v).

Solution,

In this problem, it is mentioned that element has 2 electrons in its N shell. It means that N is the outermost shell.

Shell                         :   K, L, M, N

Electrons in the shell : 2, 8, 18, 32

(i) The electronic configuration of x is :

2,8,18,2

Its atomic no is : 2+8+18+2 = 30

(ii) Zinc has atomic no 30. So, it is a metal.

(iii) No of protons = atomic no = 30

(iv) Zinc forms zinc chloride i.e. ZnCl₂

(v) It lies in the D-block of the periodic table at 12th group and 4th period.