Question

Rudium forms the postive ion Rb+. Is this ion smaller or larger than the neutral atom? Explain.

Answer 1

When we remove an electron from the outermost shell the no of electrons decreases which leads to the decrease in screening effect of the electrons which in turn lead to the increase in attraction between the nucleus and the outermost electrons thus leading to contraction

Rb+ is smaller in size than Rb

I hope this helps ( ╹▽╹ )