Question

Q4) An ion X2+ has configuration as follows:
KL
2,8
a) Predict its valency.
b) What is atomic number of X2+
c) Draw shell diagram of X.
d)Name any one element chemically similar to X.​

Answer 1

Answer:

Answer

KLM

286

(a) Since, it has 6 valence electrons, it belongs to group no. 16.

(b) It has 3 Valence shells, so it belongs to period no 3.

(c) The number of valence electron is 6.

(d) The valency of E is 2 because it requires 2 electrons to achieve its stability .

(e) It is a non-metal.

Answer 2

Answer:

a) Its valency is 2 as two electrons have been removed/lost from the outer shell in order to a noble gas configuration.

b) The atomic number is 12 as is equal to the electron number in its atom and not in its cation.

c) Check the image attached.

d) Calcium is an element chemically similar to Mg (X). This is due to the following reasons:

1. Calcium belongs to the same group (Group-2) in the periodic table as Mg.
2. They have similar electronic configuration.
3. They tend to lose 2 electrons from their outer shells to attain noble gas configurations.