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The Chemistry of Life

The Chemistry of Life. Section 2.1: The Nature of Matter Teacher: Mrs. Rolle Presenter: Mevan Siriwardane September 27, 2007. Atomic Structure. ELECTRON – negative, mass nearly nothing. NEUTRON – neutral, same mass as proton (“1”). PROTON – positive, same mass as neutron (“1”).

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The Chemistry of Life

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  1. The Chemistry of Life Section 2.1: The Nature of Matter Teacher: Mrs. Rolle Presenter: Mevan Siriwardane September 27, 2007

  2. Atomic Structure

  3. ELECTRON – negative, mass nearly nothing NEUTRON – neutral, same mass as proton (“1”) PROTON – positive, same mass as neutron (“1”) Atomic Structure

  4. The Atom Electron Nucleus Shell or Orbit

  5. The Atom Hydrogen Proton Electron Hydrogen has one proton, one electron and NO neutrons

  6. The Atom Helium Proton Electron Neutron Helium has two electrons, two protons and two neutrons

  7. MASS NUMBER = number of protons + number of neutrons 4 He SYMBOL 2 PROTON NUMBER = number of protons (obviously) Mass and atomic number

  8. The Atom Helium Proton Electron Neutron Helium has two electrons, two protons and two neutrons

  9. The Atom Lithium Electrons Protons Neutrons

  10. The Atom Beryllium Electrons Protons Neutrons Beryllium has four electrons, four protons and five neutrons.

  11. The Atom Boron Electrons Protons Neutrons Boron has five electrons, five protons and six neutrons.

  12. The Atom Carbon Electrons Protons Neutrons Carbon has six electrons, six protons and six neutrons.

  13. The Atom Nitrogen Electrons Protons Neutrons Nitrogen has seven electrons, seven protons and seven neutrons.

  14. The Atom Oxygen Electrons Protons Neutrons Oxygen has eight electrons, eight protons and eight neutrons.

  15. The Atom Fluorine Electrons Protons Neutrons Fluorine has nine electrons, nine protons and ten neutrons.

  16. The Atom Neon Electrons Protons Neutrons Neon has ten electrons, ten protons and ten neutrons.

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