Manganese as a transition metal, one of the elements that occur in the middle of the periodic table in Rows 4, 5, and 6 between Groups 2 and 13. Manganese has an atomic number of 25, and atomic mass of 54.9380, and a chemical symbol of Mn

Properties

Manganese is a steel-gray, hard, shiny metal that is so brittle it can not be machined in its pure form. The metal must always be alloyed if it is to be fabricated or worked to make some useful product. Manganese exists in four allotropic forms, the most common of which is stable to a temperature of about 1,300°F (700°C). The melting point of manganese allotrope is 2,273°F (1,245°C), its boiling point is about 3,800°F (2,100°C), and its density is 7.47 grams per cubic centimeter.

Manganese is a moderately active metal that combines slowly with oxygen in the air to form manganese dioxide...