Answer:
A) Sr
Explanation:
Strontium will require the least amount of energy to remove the most loosely bound electrons from its atom in gaseous state.
This parameter is known as the ionization energy. It is defined as the readiness of an atom to lose an electron.
- Metals in group 1 and 2 generally have very low ionization energy due to their large electropositivity
- The more electropositive a metal is, the lower its ionization energy.
- This is the reason why strontium will have the least ionization energy.
