which of the alkaline earth metal are 1.least reactive ,2. lowest density, 3.highest boiling 4. maximum reduction potential

1. The reactivity increases down the group, so least reactive alkaline earth metal is Beryllium.

2. The lowest density is of Calcium.

3. Highest boiling point is of Beryllium as it has small size, and has intensive metallic bonding.

4. Maximum reduction potential is of Beryllium.