Study the following table in which positions of six elements A, B, C, D, E arid F are shown as they are in the modem periodic table:

On the basis of the above table, answer the following questions:

(i) Name the element which forms only covalent compounds.

(ii) Name the element which is a metal with valency three.

(iii) Name the element which is a non-metal with valency three.

(iv) Out of D and E, which is bigger in size and why?

(v) Write the common name for the family to which the elements C and F belong.

Question

Study the following table in which positions of six elements A, B, C, D, E arid F are shown as they are in the modem periodic table:

On the basis of the above table, answer the following questions:

(i) Name the element which forms only covalent compounds.

(ii) Name the element which is a metal with valency three.

(iii) Name the element which is a non-metal with valency three.

(iv) Out of D and E, which is bigger in size and why?

(v) Write the common name for the family to which the elements C and F belong.

Philoid · Accepted Answer

(i) The covalent compounds will be formed by only element E.

(ii)The element which is a metal with valency three is: D

(iii) The element which is a non-metal with valency three is: B

(iv) Element D has big size as we go from left to right in a period, due to same number of shells, the size of atoms decreases as the forces of attraction increases between the valence electrons and the nucleus.

(v)Elements C and F belongs to noble gases.