Unit 1: The Chemistry of Life Extras  Study Guide

Chapter 2 9 Review
  1. Matter consists of chemical in pure form and in combinations called compounds.
  2. Each element contains a single kind of atom made of , , and .
  3. Electrons occupy different with different energy . The outermost, or , shell contains electrons.
  4. A bond is the of a pair of electrons between different atoms of a . These bonds are strong and _ani_2,1 stable.
  5. In a covalent bond the atoms have different electronegativities and share the electrons .
  6. In an bond, charged atoms called are formed.
  7. Electronegativity can also result in other weak chemical interactions.
    • A bond forms from the attraction of charged regions of molecules.
    • interactions form when transiently charged regions of molecules attract each other.
  8. _inv_2&A How Are Space Rocks Analyzed for Signs of Life?
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