Which of the following is arranged in increasing ionic radius.

Which one of the following periodic groups consists of entirely metals

Which of the following elements whose electronic configurations are given is least chemically reactive?

The chloride of an element A gives a neutral solution in water. In the periodic table, the element A belongs to:

Which of the following has the largest radius?

An element has atomic mass 31 and atomic number 15. The elements belongs to

Which pair of atomic number represents s-block elements?

Which of the following groups of elements gain elements easily?