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Periodic table notes

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Transcript

  • 1. The Periodic Table
  • 2. Periodic Table:
    Chart that shows various FAMILIES of elements
    Arranged into ROWS and COLUMNS
    Rows: across
    Columns: down
  • 3. 3. THREE categories (pieces of information) found on the Periodic Table:
    Symbol – represents a specific element
    - Ex. H is what element?
    -HYDROGEN
  • 4. b. Atomic Number – table is organized and arranged from left to right by increasing atomic number.
    **Element’s ID
    • Atomic Number = # of PROTONS = # of ELECTRONS
  • Ex. H
    Atomic Number
  • 5. Ex. S
  • 6. Ex. S
  • 7. Ex. K
  • 8. Ex. K
  • 9. c. Mass Number – Most of the mass of an atom is in the nucleus
    • Mass number is usually found under the element symbol
    • 10. Can be found by
    ADDING the PROTONS
    and NEUTRONS
  • 11. Mass # = protons + Neutrons
    Ex. H
    1 proton + 0 Neutrons = _______
    Ex. Li
    3 protons + 4 Neutrons = _______
    Ex. Al
    13 protons + 14 Neutrons = _______
  • 12. Mass # = protons + Neutrons
    How can you find the number of neutrons in Phosphorus?
    Mass # = ______
    #Protons= ______
    __________________
    # Neutrons=
  • 13. Mass # = protons + Neutrons
    How can you find the number of neutrons in Phosphorus?
    Mass # = 31
    #Protons= 15
    __________________
    # Neutrons= 16
  • 14. 4. Bohr Models
    a. Model of the atom that shows protons, neutrons, electrons, and energy levels
  • 15. 4. Lewis Dot Structures
    a. Model of the atom that shows the VALENCE electrons of the atom