TEK B.4B Concept: Investigate and Identify Cellular Processes Including Synthesis of Molecules Copyright 2008 PresentationFx.com | Redistribution Prohibited | Image © 2008 Thomas Brian | This text section may be deleted for presentation.

Water is a polar molecule because of an uneven distribution of electrons between the oxygen atom and the two hydrogen atoms. The oxygen end of the molecule is slightly negative and the hydrogen end of the molecule is slightly positive. The shape of the water molecule is slightly bent as a result. The polar nature of water makes it one of the best solvents because it is able to attract both ionic and covalent molecules.