bio

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Author:
Siobhan
ID:
99381
Filename:
bio
Updated:
2011-09-01 15:30:54
Tags:
bio chapter
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Description:
bio chapter 2
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  1. buffer
    maintains pH by adding or releasing H
  2. element
    substance that cant be separanted into simpler substances, nor converted into other substances by ordinary chemical means
  3. atoms
    fundamental structure of atoms
  4. atomic number
    number of protons
  5. atomic mass
    total mass of protons neutrols and electrons
  6. isotopes
    atoms of the same element with diff numer of neutrons
  7. molecule
    two or more attoms of the same or different elements held together
  8. inert
    atom that wont react with other atoms when its outermost shell is full
  9. free radical
    molecule that readily react with others
  10. ionic bond
    an electron is transfered, creating positive and negatve ions that attract one another
  11. covalent bond
    electrons shared. polar/ nonpolar
  12. polar
    covalent bond. unequal sharing.
  13. nonpolar
    covalent. equal sharing
  14. hydrogen bond

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