Ionic Radii and Isoelectronic Series

Cations have a ___ radius in its neutral state because the loss of electrons create a ___ pull towards its nucleus

smaller; stronger

Anions are ____ in radius because it gained an electron which leads to more repulsion and a ___ pull towards its nucleus

larger; weaker

What is an isoelectronic series? Can you give me an example with Ne? Use periodic table

Different atoms with the same number of electrons. Example with Ne is: N³-, O²-, F^1-, Ne, Na^+1, Mg²+, Al³+

How do we determine what atoms are bigger in an isometric series?

The more protons, the smaller the radius

Which is bigger in ionic radius from increasing order. Use periodic table:

K+, Cl-, S²-, Se²-

K —> 19 protons 18 electrons
Cl —> 17 protons 18 electrons
S —> 16 protons 18 electrons
Se —> Has a larger shell than the rest

K < Cl < S < Se