Chemistry. non polar/polar , hydrogen bonding?

In a group (such as the ones above N,P,As,Sb........O,S,Se,Te.......& ofcourese the Halogens F,Cl,Br,I) as the atomic number increases or as you go down,the Atom gets bigger in size.....so the polarity reduces....& if the other atom in the element doesn`t have a very high Negative charge density than the bonding isn`t sufficiently polar for Hydrogen Bond.......as you go towards the right side of a period.......negative polarity increases...... so HF is most polar,then H20 & finally NH3.....HCl,HBr,PH3,H2S shows Hydrogen Bonding,others don`t show it significantly.......& when the two atoms in a covalent bond has a charge difference of atleast 2 or above .......the bonding is polar........that`s why H2Te isn`t really polar.....its more Ionic in nature,Same goes for SbH3.....that`s pretty much it.....just don`t write it like I did in the exam XD