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Atoms – Keep it forever place. An atom has small particles that make up the atom. An element is made of atoms. A substance is made out of elements. For any element: Number of Protons = Atomic Number Number of Electrons = Number of Protons = Atomic Number

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Presentation Transcript
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An atom has small particles that make up the atom.

  • An element is made of atoms.
  • A substance is made out of elements.
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For any element:

  • Number of Protons = Atomic Number
  • Number of Electrons = Number of Protons = Atomic Number
  • Number of Neutrons = Mass Number - Atomic Number

Example Krypton:

  • Number of Protons = Atomic Number = 36
  • Number of Electrons = Number of Protons = Atomic Number = 36
  • Number of Neutrons = Mass Number - Atomic Number = 84 - 36 = 48
how many protons neutrons and electrons
How many Protons, Neutrons, and Electrons?

Mass Number = (Number of Protons) + (Number of Neutrons)

Number of Protons = Number of Electrons