Classification ...

Electron affinity depends on

The second ionisation potential of an element $M$ is the energy required to

An atom of an element has electronic configuration $2,8,1$. Which of the following statement is correct

The most common oxidation state of an element is $-2$. The number of electrons present in its outermost shell is

Which of the following statement is not correct for the element having electronic configuration $1s^{2} 2s^{2} 2p^{6} 3s^{1}$

Increase order of electron affinity is 

Which of the following pairs of species has the same electronic configuration?

Which of the following has the least electron affinity in $kJmol^{-1}$

On going from right to left in a period in the periodic tables the electronegativity of the elements

The electronic structure $(n-1)d^{1-10}ns^{0-2}$ is characteristic of