Locate the position in the periodic table of the following elements on the basis of their properties: a] An element is an inert gas with atomic number 10. b] An element is tetravalent and a basic element of organic chemistryc] A soft metal stored under kerosene that can be cut with knife.

Locate the position in the periodic table of the following elements on

1.	Locate the position in the periodic table of the following elements on the basis of their properties: a] An element is an inert gas with atomic number 10. b] An element is tetravalent and a basic element of organic chemistryc] A soft metal stored under kerosene that can be cut with knife.
Answer» Solution :a) Since the ELEMENT is an inert gas, its group number is 18. Since its ATOMIC number is 10, it is placed in period 2,below helium. b] Since the element is tetravalent, it is placed in group 14. It is a basic element of organic chemistry: means it has to be carbon which is placed in the SECOND period. c] The element is sodium which is placed in the 1st group and the 3rd period.