LIFE 102 Lecture Notes - Lecture 3: Chemical Polarity, Electronegativity, Fluorine
Document Summary
The number of electrons in the valence shell determines an atom"s behavior. Electronegativity- the ability of an atom to draw electrons towards itself. An atom with more electronegativity will have more protons. Atoms like lithium or sodium are not high electronegativity. Atoms like fluorine or chlorine have high electronegativity. Electronegativity atoms very strongly attract nearby electrons. In a polar bond, one of the atoms attracts the e- pair more strongly than the other. The polar is because the atom has a slight electronegative charge. Can be between two different molecules or within the same molecule. They are very important to biology: they are weak. Hydrogen bonds- attract each other and snuggle up. Bonds between atoms in reactants are broken, atoms are rearranged, and new bonds are formed. Mass conservation law: all atoms present in the reactants are still present in the products. Rates: influenced by concentration of all reactants. Forwards and reverse reactions occur at equal rate.
