In the following table, the positions of six elements A, B, C, D, E and F are given as they are in the Modern 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 B and C, whose atomic radius is bigger and why? (v) Write the common name for the family to which the elements D and F belong.

In the following table, the positions of six elements A, B, C, D, E an

1.	In the following table, the positions of six elements A, B, C, D, E and F are given as they are in the Modern 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 B and C, whose atomic radius is bigger and why? (v) Write the common name for the family to which the elements D and F belong.
Answer» Solution : (i) E(II) B(iii) C (IV) B, because atomic radius decreases from left to right due to INCREASE in the nuclear charge.(v) Noble gases