Terminology used in Chemistry.

Ionization energy: decreases when going down the group because when going down the group the number of shells around the atomic radius increases and the outer electrons become weakly attracted by the nucleus.
As you go to the rite the no. Of neutrons in the nucleus (+) charged particles increases. This pulls the electrons towards the nucleus. Therefore making it more difficult to remove the electrons.
Electro-positively: increases down the group e.g. Potassium is more electropositive that sodium and decreases along the period from left to the right.
Electro-negatively: decreases down…