Compared to what? But it would be less reactive because the s orbital is filled, the electrons are all paired. If you mean "Why is beryllium the least reactive of the Group II alkaline earth metals?", then this is because it has the least electron shielding, having an electron configuration of 2, 2. Beryllium is at the top as the first of the Group II alkaline earth metals, and reactivity increases as you go down Groups I and II.
Beryllium is not so reactive; the electronegativity after Pauling scale is 1,57.
reactive
Ba; Barium
Francium is considered the most reactive of the group 1 elements. This is because it is the largest of all elements in group 1, therefore takes the least amount of energy to lose an electron (Group 1 elements react by losing electrons.)
Titanium
Beryllium is the least reactive in the group 2.
Beryllium is not so reactive; the electronegativity after Pauling scale is 1,57.
reactive
No, strontium is more reactive than beryllium.
Beryllium is not so reactive; the electronegativity after Pauling scale is 1,57.
All alkali (not alkaline-earth) metals are extremely reactive with water, but within the group, lithium is the least reactive.
Lithium is more reactive.
The Zinc Family also known as group IIB is the second least reactive I believe. The least reactive family is the one with a full p sublevel, the noble gases, the next least reactive would be the family with a full d sublevel. Since group IIB has a full d sublevel, it must be the next least reactive family.
lithium
Look at any periodic table: Beryllium #4 Magnesium #12 Calcium #20 Strontium #38 Barium #56 Radium #88
Ba; Barium
Beryllium react with the members of halogens family (group 17) and chalcogens (group 16).