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Periodic table notes
 

Periodic table notes

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    Periodic table notes Periodic table notes Presentation Transcript

    • The Periodic Table
    • Periodic Table:
      Chart that shows various FAMILIES of elements
      Arranged into ROWS and COLUMNS
      Rows: across
      Columns: down
    • 3. THREE categories (pieces of information) found on the Periodic Table:
      Symbol – represents a specific element
      - Ex. H is what element?
      -HYDROGEN
    • 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
    • Ex. S
    • Ex. S
    • Ex. K
    • Ex. K
    • c. Mass Number – Most of the mass of an atom is in the nucleus
      • Mass number is usually found under the element symbol
      • Can be found by
      ADDING the PROTONS
      and NEUTRONS
    • Mass # = protons + Neutrons
      Ex. H
      1 proton + 0 Neutrons = _______
      Ex. Li
      3 protons + 4 Neutrons = _______
      Ex. Al
      13 protons + 14 Neutrons = _______
    • Mass # = protons + Neutrons
      How can you find the number of neutrons in Phosphorus?
      Mass # = ______
      #Protons= ______
      __________________
      # Neutrons=
    • Mass # = protons + Neutrons
      How can you find the number of neutrons in Phosphorus?
      Mass # = 31
      #Protons= 15
      __________________
      # Neutrons= 16
    • 4. Bohr Models
      a. Model of the atom that shows protons, neutrons, electrons, and energy levels
    • 4. Lewis Dot Structures
      a. Model of the atom that shows the VALENCE electrons of the atom