Biology

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Author:
Toastedbread
ID:
105787
Filename:
Biology
Updated:
2011-10-05 18:29:10
Tags:
elements atoms molecules biology
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Description:
Chapter 2 vocab
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  1. anything that occupies space and has mass
    MATTER
  2. a substance that cannot be broken down into other substances
    ELEMENT
  3. you need less than .01% of these to live
    ex: zinc, copper, iron, boron...
    TRACE ELEMENTS
  4. a substance consisting of 2 or more elements combined in a fixed ratio
    ex: table salt (NaCl)
    COMPOUND
  5. small unit of matter that retains properties of an element
    ATOM
  6. refers to thenumber of protons in an atom
    ATOMIC NUMBER
  7. protons+neutrons
    MASS NUMBER
  8. atoms share, donate, and receive electrons to fill their shell
    CHEMICAL BOND
  9. an atom or molecule with an electrical charge resulting from a gain of loss of electrons
    ION
  10. when attractions hold ions with opposite charges together
    IONIC BONDING
  11. results when atoms share outer shell electrons
    COVALENT BOND
  12. formed when atoms are held together by covalent bonds
    MOLECULE
  13. the attraction for shared electrons
    ELECTRONEGATIVITY
  14. the attraction between atoms and shared electrons is equal
    NONPOLAR
  15. the atoms have a different electronegativity (the attraction between atoms and shared electrons is not equal)
    POLAR
  16. when 2 polar molecules are next to each other (hydrogen is one of them)
    HYDROGEN BOND
  17. hydrogen bonds cause like molecules to stick together
    COHESION
  18. the clinging of one substance to another
    ADHESION
  19. a liquid consisting of a uniform mixture of 2 or more substances.
    SOLUTION
  20. the dissolving agent (dissolves other things)
    SOLVENT
  21. the dissolved substance
    SOLUTE
  22. have more H+ than OH-
    ACIDIC SOLUTIONS
  23. have more OH- than H+
    BASIC SOLUTIONS
  24. used to describe whether a solutions is acidic or basic
    pH SCALE
  25. 2H2 + O2 >>> 2H2O
    CHEMICAL REACTION

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