Manganese was discovered by Johann Gahn at 1774 in Sweden.
Origin of name: from the Latin word "magnes" meaning "magnet",
or "magnesia nigri" meaning "black magnesia" (MnO2).
Atomic Number: 26
Atomic Weight: 55.845
Melting Point: 1811 K (1538°C or 2800°F)
Boiling Point: 3134 K (2861°C or 5182°F)
Density: 7.874 grams per cubic centimeter
Phase at Room Temperature: Solid
Element Classification: Metal
Period Number: 4 Group Number: 8 Group Name: none