The general electron configuration of p – block elements are

Cl belongs to …………… family.

Number of elements present in period 1 are

Which of the following element is electronegative?

Number of vertical columns in the modern periodic table are

The elements which have both metallic and non metallic properties are called

The examples for metalloids

The distance from the centre of the nucleus of the atom to its outermost shell is

Atomic radius is measured in

1 pm = ……………. m

The correct ascending order of atomic size for the following elements C, Li, N, Be :

Which among these have greater size?

Which of the following has greater size?

The energy required to remove an electron from the outermost orbit or shell of a neutral gaseous atom is

The least electronegative element is