The Element Manganese


Manganese resembles iron with its grey-white outlook. It is known as a hard metal but is also very brittle and is easily oxidized. Manganese occurs in many forms and components and their uses are a many. Biologically, it is known to be an essential nutrient present in different classes of enzymes.

Exposure to manganese dusts and fumes are supposed to be a health hazard due to its high toxicity level. Manganese poisoning in children can lead to impaired motor skills and cognitive disorders while chronic exposure to manganese have made miners lose their sanity.

Atomic Number & Chemical Properties


Element Basics:

Chemical Symbol: Mn
Atomic Number: 25
Atomic Weight: 54.93805
Element Classification: Transition Metal
Discovered By: Johann Gahn
Date of Discovery: 1774 (Sweden)
Origin of Name: Latin: magnes (magnet); Italian: manganese.

How to Recognize it at a Party:

Hard, brittle, gray-white metal

Seriously Atomic Information:

Density (g/cc): 7.21
Melting Point (°K): 1517
Boiling Point (°K): 2235
Atomic Radius (pm): 135
Atomic Volume (cc/mol): 7.39
Covalent Radius (pm): 117
Ionic Radius: 46 (+7e) 80 (+2e)
Pauling Negativity Number: 1.55
First Ionizing Energy (kJ/mol): 716.8
Oxidation States: 7, 6, 4, 3, 2, 0, -1
Electronic Configuration: [Ar] 3d5 4s2

Getting Intimate with Manganese:

Lattice Structure: Cubic (CUB)
Lattice Constant (Å): 8.890
Lattice C/A Ratio: n/a
Specific Heat (@20°C J/g mol): 0.477
Fusion Heat (kJ/mol): (13.4)
Evaporation Heat (kJ/mol): 221
Thermal Conductivity (@25°C W/m K):
Debye Temperature (°K): 400.00


Society's Questions About Manganese:

Have you ever wondered what everyone else in the world thinks about Manganese? Is anyone else looking for it too? If so, why? What do they want?

The following list shows the most common online questions about the element Manganese. Are your questions the same or different from everyone else's?

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