Atomic Structure

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Atomic Structure
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Atomic Structure

• Nucleus
• Protons
• Neutrons
• Electrons

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Atomic Structure

• Electrons
• Tiny, very light particles
• Have a negative electrical charge (-)
• Move around the outside of the nucleus

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Atomic Structure

• Protons
• Much larger and heavier than electrons
• Protons have a positive charge ()
• Located in the nucleus of the atom 

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Atomic Structure

• Neutrons
• Large and heavy like protons
• Neutrons have no electrical charge
• Located in the nucleus of the atom 

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Atomic Structure
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Describing Atoms

• Atomic Number number of protons
• In a neutral atom, the of protons the of
  electrons

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Describing Atoms

• Atomic Mass Number - equal to the number of
  protons plus neutrons.

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Describing Atoms

• Atomic Weight - average mass of the naturally
  occurring isotopes of an element .