This video lecture from Periodic Classification of Elements and Periodicity (F.Sc. second year Chemistry) covers: Binary compounds of hydrogen with other elements. Ionic, covalent and intermediate bond type in hydrides and their dependence on electronegativity difference. Stability affects of hydrides in groups and periods. Bond polarity affects. The anamolous nature of hydrogen bonding and the melting/boiling points particularly in relation with bond type. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.