Question

The following table shows the position of six elements A, B, C, D, E and F in the Periodic Table.

Using the above table answer the following questions:
(a) Which element will form only covalent compounds?
(b) Which element is a metal with valency 2?
(c) Which element is a non-metal with valency 3?
(d) Write a common name for the family of elements C and F.
(e) Out of D and E, which one has a bigger atomic radius and why?

Answer 1

(a) E
(b) D
(c) B
(d) The noble gases.
(e) D has bigger atomic radius. The atomic radius decreases in moving from left to right along a period. This is due to an increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom.