|Classification||Group IVA, Carbon family|
|Number of Stable Isotopes||70, 72, 73, 74, 76|
|Number of Unstable Isotopes||66, 67, 68, 69, 71, 75, 77, 78|
|Melting point (°C)||937.4 (1,720.85 °F)|
|Boiling point (°C)||2,830 (5,131 °F)|
|Density (grams per cc)||5.323|
|Hardness (Moh's scale)||6.25|
|Abundance in lithosphere (%)||0.0007|
|Oxidation states||+2, +4|
|Date of discovery||1886|
|Name of discoverer||Clemens Winkler|
|Name origin||From the Latin word Germania, Germany|
|Obtained from||Refining of copper, zinc, lead|
Germanium (jer-MAY-ni-em) is a brittle, silvery-white semi-metal (metalloid).
Germanium was first proposed to exist by Dmitri Mendeleyev in 1871. He had recently created a Periodic Table of Elements, and identified gaps which where unknown elements. Germanium was officially discovered in 1886 by Clemens Winkler, a German chemist. He found it in the mineral argyrodite (Ag8GeS6).
|Periodic Table of the Elements|