Chapter 3 NOTES OUTLINE: by HC121105011243

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									Chapter 3 NOTES OUTLINE:
Atoms
   • Atoms are the smallest building blocks of matter, that cannot be broken down by
       chemical means:
Subatomic Particles:
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   •   Nucleus: Center of the atom. Contains protons and neutrons. Has a positive
       charge.




   •   Large area that surrounds the nucleus and contains the electrons.
          – Divided into different energy levels or orbitals.
          – Valence electrons are in the outermost level.




   •   Chemical bonds are formed when atoms share or exchange electrons.




   •   Compounds are formed when elements bond.
         – Covalent Compounds are formed when 2 elements share a covalent bond.
•   Molecules with a partial electric charge on one side are called Polar molecules




•   When bonded to oxygen, nitrogen, or flourine, hydrogen maintains a slight
    positive charge.

								
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