Symbol: Yb

Atomic Number: 70

Mass: 173.04 g/mol

Density: 6.9 g/cm

Boiling Point: 1469 K

-Ytterbium is used in X-Rays.

-Ytterbium can also be used to improve stainless steel.

Symbol: U

Atomic Number: 92

Mass: 238.0289 g/mol

Density: 19.1 g/cm

Boiling Point: 4404 K

-Uranium is used in the creation of nuclear bombs, along with nuclear power plants.

Symbol: La

Atomic Number: 57

Mass: 138.905 g/mol

Density: 6.162 g/cm

Boiling Point: 3137 K

-Lanthanum is used in Carbon lighting and movie projectors.

-Lanthanum can also be added to steel to increase the malleability.

Symbol: Ce

Atomic Number: 58

Mass: 140.116 g/mol

Density: 6.77 g/cm

Boiling Point: 3716 K

-Used in the making of aluminum alloys and stainless steel.

-Cerium gives glass a golden yellow color.

Symbol: Am

Atomic Number: 95

Mass: 243 g/mol

Density: 12 g/cm

Boiling Point: 2880 K

-Americium is used in smoke detectors.

-Americium is also used in the creation of flat glass.

Symbol: Pr

Atomic Number: 59

Mass: 140.907 g/mol

Density: 6.77 g/cm

Boiling Point: 3793 K

-Used in the making of cigarette lighters.

-Widely used in studio lighting and projectors.

Symbol: Dy

Atomic Number: 66

Mass: 162.5 g/mol

Density: 8.54 g/cm

Boiling Point: 2840 K

-Used to cool nuclear reactor rods.

-Dysprosium is used in the making of laser materials.

-Symbol: Ho

Atomic Number: 67

Mass: 164.93 g/mol

Density: 8.76 g/cm

Boiling Point: 2993 K

-Holmium is used a red or yellow glass coloring.

-Used in jewelry and lasers.