Properties of the elements are given below. Where would you locate the following elements in the periodic table?
(a) A soft metal stored under kerosene
Ans. Sodium Group 1, Period 3
(b) An element with variable (more than one) valency stored under water.
Ans. Phosphorus Group 15, Period 3
(c) An element which is tetravalent and forms the basis of organic chemistry
Ans. Carbon Group 14, Period 2
(d) An element which is an inert gas with atomic number 2.
Ans. Helium Group 18, Period 1
(e) An element whose thin oxide layer is used to make other elements corrosion resistant by the process of “anodising”
Ans. Aluminum Group 13, Period 3
