Column - I	Column - II
A) Rubidium	1) Electronegative element
B) The energy released during addition of electron	2) Ionization energy
C) Chlorine	3) Electropositive element
D) The energy required for removal of electron	4) Electron affinity

I) Rubidium is an alkali metal (IA group). It has one electron excess. So it looses one electron to get octet configuration. So it is electro positive element.

II) The energy released during addition of electron is called electron affinity.

III) Chlorine is a halogen family  (VIIA group) it has  just one electron short to get octet configuration. So that it is gaining one more electron to attain octet number. Therefore Chlorine is a electro negative element.

IV) The energy required for removal of electron is called ionization energy.