Atoms and Isotopes

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Atoms and Isotopes
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Mass Number

• The mass number is the
• number of protons
• PLUS the number of
• neutrons

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• The mass of the atom is
• mainly inside the nucleus!
• (where the p and n0 are)

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Isotopes

• Isotopes are atoms of the same element with the
  same number of protons, but DIFFERENT NUMBERS OF
  NEUTRONS

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Isotopic Notation
mass number
symbol
atomic number
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example
mass number
Ne
atomic number
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Isotopic Name
element name mass number
Neon 22
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Directions Copy chart and Fill in the blank
cells in the table below using the information
given.
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7.
10.
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10.