The Chemistry of Life

1
The Chemistry of Life

• Section 2.1 The Nature of Matter
• Teacher Mrs. Rolle
• Presenter Mevan Siriwardane
• September 27, 2007

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Atomic Structure
3
Atomic Structure
4
The Atom
Electron
Nucleus
Shell or Orbit
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The Atom Hydrogen
Proton
Electron
Hydrogen has one proton, one electron and NO
neutrons
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The Atom Helium
Proton
Electron
Neutron
Helium has two electrons, two protons and two
neutrons
7
Mass and atomic number
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The Atom Helium
Proton
Electron
Neutron
Helium has two electrons, two protons and two
neutrons
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The Atom Lithium
Electrons
Protons
Neutrons
10
The Atom Beryllium
Electrons
Protons
Neutrons
Beryllium has four electrons, four protons and
five neutrons.
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The Atom Boron
Electrons
Protons
Neutrons
Boron has five electrons, five protons and six
neutrons.
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The Atom Carbon
Electrons
Protons
Neutrons
Carbon has six electrons, six protons and six
neutrons.
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The Atom Nitrogen
Electrons
Protons
Neutrons
Nitrogen has seven electrons, seven protons and
seven neutrons.
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The Atom Oxygen
Electrons
Protons
Neutrons
Oxygen has eight electrons, eight protons and
eight neutrons.
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The Atom Fluorine
Electrons
Protons
Neutrons
Fluorine has nine electrons, nine protons and ten
neutrons.
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The Atom Neon
Electrons
Protons
Neutrons
Neon has ten electrons, ten protons and ten
neutrons.