Which of the following has the highest ionization energy in the whole periodic table?

Which of the following has the biggest ionic radius?

Which pair of atomic number represents s-block elements?

Which of the following is arranged in increasing ionic radius.

Which of the following electronic configuration in the outer shell is characteristic of alkali metals?

The outermost electronic configuration of alkaline earth metals is 

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

Which of the electronic configuration given below corresponds to an element with the lowest ionization energy?