Question

The metals of group two from top to bottom are : Be, Mg, Ca, Sr, Ba.

Which of these metals will form ions most readily and why?

Answer 1

Ionization energy, ionization energy is the minimum energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule

Due to lowest ionization energy,

Barium will form ions most readily as it will require least amount of energy to remove the most loosely bound electron of an isolated atom.