bio exam 2

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Author:
emanoyian
ID:
296498
Filename:
bio exam 2
Updated:
2015-02-22 13:06:33
Tags:
bio exam
Folders:
bio
Description:
review for exam 2
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  1. C
    carbon
  2. o
    oxygen
  3. n
    nitrogen
  4. h
    hydrogen
  5. s
    sulfer
  6. matter
    anything that occupies space and has mass
  7. element
    a substance that cannot be broken down into other substances by chemical means.
  8. compound
    a substance containing two or more elements in a fixed ratio
  9. atom
    the smallest unit of matter that retains the properties of an element.
  10. proton
    a subatomic particle with a single unit of positive electrical charge found in the nucleus of an atom
  11. neutron
    an electrically neutral particle found in the nucleus of an atom.
  12. atomic number
    the number of protons in each atom of a particular element.
  13. mass number
    the sum of the number of protons and neutrons in an atoms nucleus
  14. isotopes
    a variant from an atom
  15. ion
    an atom or molecule that has gained or lost one or more electrons thus acquiring an electrical charge
  16. molecule
    a group of two held together by covalent bonds
  17. polar molecule
    a molecule containgan uneven distribution of charge due to the presence of polar covalent bonds

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