NUMBER OF PARTICLES IN AN ATOM

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NUMBER OF PARTICLES IN AN ATOM
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ATOMIC NUMBER

• DEFINITION THE NUMBER OF PROTONS
• FACTS
• IDENTIFIES THE TYPE OF ELEMENT
• NUMBER OF ELECTRONS NUMBER OF PROTONS IN AN
  ATOM

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MASS NUMBER

• DEFINITION NUMBER OF PROTONS NUMBER OF
  NEUTRONS
• FACTS
• IS THE APPROXIMATE MASS OF THE ATOM
• IDENTIFIES WHICH ISOTOPE

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ISOTOPES

• DEFINITION ATOMS OF THE SAME ELEMENT WITH
  DIFFERENT MASSES
• FACT
• HAVE THE SAME CHEMICAL PROPERTIES BUT MIGHT HAVE
  DIFFERENT PHYSICAL NUCLEAR PROPERTIES
• ALSO CALLED A NUCLIDE
• EXAMPLES
• 235U 238U
• H-1, H-2, H-3

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