Using ideas of electronic structure, what happens to the radii of the atoms in group 1 or 2, when the group is descended?
Atomic radii increase going down a group
The general trend for atomic radius is that it increases going down a group in the periodic table. Why is this?
Each new period you come across going down the group contains electrons that occupy atomic orbitals that have a probability density that extends farther from the nucleus.
For groups 1 and 2 elements, the most loosely-bound electron will occupy an