BIOL 1020 Lecture Notes - Lecture 3: Hydrogen Bond, Electronegativity, Ice Crystals

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1020
• Professor: Joy E.Stacey

Document Summary

Biol 1020 - lecture 1 -basic chemical concepts,properties of water. Life on earth evolved in water, thus most of our chemistry and biology revolves around water. 70% of our body is made out of water. When we observe distant planets we initially observe for water and liquid with similar properties. Thus, water accessibility, quality and its innate nature matters. Just like north and south of our planet with two poles, water too is a polar. Water is made up of one central oxygen and two hydrogen atoms,but the asymmetrical arrangements of bond angles leads to the uneven electron distribution giving oxygen more electronegativity and hydrogen more electropositivity. Thus oxygen becomes partial positive and hydrogen being partial negative. Hydrogen bonding results from polarity, thus h atoms can form bonding with any other electronegative molecules. But usually, hydrogen would not compensate forming a hydrogen bond with other molecules at the expense of another water molecule.