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Basic Chemistry

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Elements are represented by one to two letter symbols. Chemistry Vocabulary. Isotope: atoms of the same element that have different numbers of neutrons ... – PowerPoint PPT presentation

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Title: Basic Chemistry


1
Basic Chemistry
2
Background
  • Element a substance that cannot be broken down
    into simpler chemical substances.
  • 96 of the human body is composed of 4 elements
    carbon, hydrogen, oxygen, and nitrogen
  • Elements are represented by one to two letter
    symbols

3
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4
Chemistry Vocabulary
  • Isotope atoms of the same element that have
    different numbers of neutrons
  • Example C-12 C-14
  • Ion charged particle made of atoms
  • Metabolism all the chemical reactions that
    occur within an organism

5
  • pH measure of how acidic or basic a solution is
  • Acid any substance that forms hydrogen ions in
    water pH below 7
  • Base any substance that form hydroxide ions in
    water pH above 7
  • Buffer substance used to minimize the change in
    pH

6
Organic vs. Inorganic
  • Organic relating or belonging to the class of
    chemical compounds having a carbon basis
  • Important organic substance carbon
  • Inorganic Describing a substance not derived
    from a living organism
  • Important inorganic substance water

7
Properties of Water
  • Water is composed of two hydrogens and one oxygen
  • Water is a polar molecule has an unequal
    distribution of charges.
  • Water can form hydrogen bonds
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