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Biology Skeleton Notes 10/3/01

 

Basic Chemistry

I.  Elements and Atoms

          A.  Element-a substance that cannot be ______________________                __________________________________________________

          B.  Over 112 ___________________________________________

          C.  Trace elements essential for life are ______________________

          D.  Atom-the smallest particle of an _________________________

               __________________________________________________

II.  Elements in the Human Body

          96 % of the mass in a human body is:

A.

          B.

          C.

          D.

III.  Structure of an Atom

          A. Nucleus____________________________________________

              __________________________________________________

          B.  Electron Cloud ______________________________________

              __________________________________________________

          C.  Energy Levels-

                    A.  1st-

                    B.  2nd

                    C.  3rd-

IV. Compounds and Bonding

          A.  Compound- A substance that is _________________________

              _________________________________________________

          B.  Covalent bonds-Atoms that share _______________________

          C.  Molecules-Are held together by ________________________

          D.  Ionic bonds-Atoms that give up ________________________

              _________________________________________________

V.  pH scale

          A.  Based on powers of __________

          B.  Acids are below pH of ________

                    1. Contain more __________________

          C.  Bases are above pH of ________            

                    1.  Contain more __________________

          D.  Mixture ___________________________________________

              __________________________________________________

          E.  Solution ___________________________________________

               __________________________________________________