Cerium

    Name: Cerium
    Symbol: Ce
    Number of Energy Levels: 6
    Electrons on the outer energy level: 2
    Atomic number: 58
    Atomic Mass: 140.116 Amu (Atomic Mass Units)
    Protons/Electrons: 58
    Neutrons: 82
    Density: 6.773 g/cm3
    Classification: Rare Earth

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      Lanthanum

      Name: Lanthanum
      Symbol: La
      Number of Energy Levels: 6
      Electrons on the outer energy level: 2
      Atomic number: 57
      Atomic Mass: 138.9055 Amu (Atomic Mass Units)
      Protons/Electrons: 57
      Neutrons: 82
      Density: 6.7 g/cm3
      Classification: Rare Earth

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        Barium

        Name: Barium
        Symbol: Ba
        Number of Energy Levels: 6
        Electrons on the outer energy level: 2
        Atomic number: 56
        Atomic Mass: 137.327 Amu (Atomic Mass Units)
        Protons/Electrons: 56
        Neutrons: 81
        Density: 3.51 g/cm3
        Classification: Alkaline Earth

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          Cesium

          Name: Cesium
          Symbol: Cs
          Number of Energy Levels: 6
          Electrons on the outer energy level: 1
          Atomic number: 55
          Atomic Mass: 132.9054 Amu (Atomic Mass Units)
          Protons/Electrons: 55
          Neutrons: 78
          Density: 1.873 g/cm3
          Classification: Alkali Metal

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            Xenon

            Name: Xenon
            Symbol: Xe
            Number of Energy Levels: 5
            Electrons on the outer energy level: 8
            Atomic number: 54
            Atomic Mass: 131.29 Amu (Atomic Mass Units)
            Protons/Electrons: 54
            Neutrons: 77
            Density: 5.897 g/cm3
            Classification: Noble Gas

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              Iodine

              Name: Iodine
              Symbol: I
              Number of Energy Levels: 5
              Electrons on the outer energy level: 7
              Atomic number: 53
              Atomic Mass: 126.904 Amu (Atomic Mass Units)
              Protons/Electrons: 53
              Neutrons: 74
              Density: 4.93 g/cm3
              Classification: Halogen

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                Tellurium

                Name: Tellurium
                Symbol: Te
                Number of Energy Levels: 5
                Electrons on the outer energy level: 6
                Atomic number: 52
                Atomic Mass: 127.6 Amu (Atomic Mass Units)
                Protons/Electrons: 52
                Neutrons: 76
                Density: 6.24 g/cm3
                Classification: Metalloid

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                  Antimony

                  Name: Antimony
                  Symbol: Sb
                  Number of Energy Levels: 5
                  Electrons on the outer energy level: 5
                  Atomic number: 51
                  Atomic Mass: 121.76 Amu (Atomic Mass Units)
                  Protons/Electrons: 51
                  Neutrons: 71
                  Density: 6.684 g/cm3
                  Classification: Metalloid

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                    Tin

                    Name: Tin
                    Symbol: Sn
                    Number of Energy Levels: 5
                    Electrons on the outer energy level: 4
                    Atomic number: 50
                    Atomic Mass: 118.71 Amu (Atomic Mass Units)
                    Protons/Electrons: 50
                    Neutrons: 69
                    Density: 7.31 g/cm3
                    Classification: Other Metals

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                      Indium

                      Name: Indium
                      Symbol: In
                      Number of Energy Levels: 5
                      Electrons on the outer energy level: 3
                      Atomic number: 49
                      Atomic Mass: 114.818 Amu (Atomic Mass Units)
                      Protons/Electrons: 49
                      Neutrons: 66
                      Density: 7.31 g/cm3
                      Classification: Other Metals

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