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Locate the position in the periodic tabl...

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 chemistry
c] A soft metal stored under kerosene that can be cut with knife.

Text Solution

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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.
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