Germanium
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Germanium is a chemical element; it has the symbol Ge and atomic number 32. It is lustrous, hard-brittle, grayish-white and similar in appearance to silicon. It is a metalloid in the carbon group that
Polycrystalline germanium
Renierite
A PET bottle
Arsenic
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Arsenic is a chemical element; it has the symbol As and atomic number 33. It is a metalloid and one of the pnictogens, and therefore shares many properties with its group 15 neighbors phosphorus and a
Germanium
…for Germany) in honor of his homeland. Argyrodite proved empirically to be Ag8GeS6. Because this new element showed some similarities with the elements arsenic and antimony, its proper place in the periodic table was under consideration, but its similarities with Dmitri Mendeleev's predicted element "ekasilicon…
Arsen 1a
Gray arsenic nodule
A large sample of native arsenic from Sainte-Marie-aux-Mines, France
Realgar