Question

The atomic number of an element X is 20.

a) What must an atom of X do to attain the nearest inert gas configuration?

b) Which inert gas is nearest to X? What is its atomic number?

c) What type of ion will an atom of X form?

d) What is the formula of the oxide formed by X?

e) Will the oxide of X be covalent or ionic? Give reason for your answer.​

Answer 1

a) X must lose two electrons in order to gain nearest inert gas configuration that is of Argan

b) the nearest inert gas to X is argan and atomic number is 18

c) X would form ionic bond

d) the the formula of its oxide would be

XO

e) it would form ionic bond as it is formed by cations and anions

Answer 2

Answer:

This element is calcium(Ca)

Explanation:

a) It will lose 2 electrons so that it have only 8 electrons in outer shell

b) Argon is nearest to it

c) It will form a positive ion

d) As its valency is 2. The oxide will be XO(CaO)

e) Oxide of X will be ionic as one is metal and other is non metal so the metal gives electron and non metal takes electron. Hence it is ionic compound