A part of the periodic table has been shown below: Answer the following questions on the basis of position of elements in the above table : (a) Which element is a noble gas? Give reason. (b) Which element is most electronegative ? Give reason. (c) Write the electronic configuration of B and E.

A part of the periodic table has been shown below: Answer the follo

1.	A part of the periodic table has been shown below: Answer the following questions on the basis of position of elements in the above table : (a) Which element is a noble gas? Give reason. (b) Which element is most electronegative ? Give reason. (c) Write the electronic configuration of B and E.
Answer» Solution :Element G is a noble gas, because it is present in group 18 and has ZERO VALENCY. (b) Element E is the most electronegative element due to its small SIZE and GREATER tendency to gain electrons. (c) Electronic configuration of .B. = 2, 8, 1 Electronic configuration of .E. = 2,7