Mangaan
25
Mn
Groep
7
Periode
4
Blok
d
Protrone
Elektrone
Neutrone
25
25
30
Algemene Eienskappe
Atoom Nommer
25
Atoommassa
54,938045
Massa Nommer
55
Kategorie
Oorgangsmetale
Kleur
Silver
Radioaktief
Nee
From the Latin word magnes, magnet, from magnetic properties of pyrolusite
Kristalstruktuur
Ligaamsgesentreerde kubieke
Geskiendenis
By the mid-18th century, Swedish chemist Carl Wilhelm Scheele had used pyrolusite to produce chlorine.
Scheele and others were aware that pyrolusite contained a new element, but they were not able to isolate it.
Johan Gottlieb Gahn was the first to isolate an impure sample of manganese metal in 1774, by reducing the dioxide with carbon.
Scheele and others were aware that pyrolusite contained a new element, but they were not able to isolate it.
Johan Gottlieb Gahn was the first to isolate an impure sample of manganese metal in 1774, by reducing the dioxide with carbon.
Elektrone per skil
2, 8, 13, 2
Elektronkonfigurasie
[Ar] 3d5 4s2
Neanderthals may have used black manganese di oxide as a cosmetic 50,000 years ago
Fisiese Eienskappe
Fase
Soliede
Digtheid
7,44 g/cm3
Smeltpunt
1519,15 K | 1246 °C | 2274,8 °F
Kookpunt
2334,15 K | 2061 °C | 3741,8 °F
Heat of Fusion
13,2 kJ/mol
Heat of Vaporization
220 kJ/mol
Spesifieke Hitte Kapasiteit
0,479 J/g·K
Oorvloed in die aardkors
0,11%
Oorvloed in die heelal
0,0008%
CAS Nommer
7439-96-5
PubChem CID Nommer
23930
Atomiese Eienskappe
Atoom radius
127 pm
Kovalente Radius
139 pm
Elektronegatiewiteit
1,55 (Pauling scale)
Ionisasie potensiaal
7,434 eV
Atoom volume
7,4 cm3/mol
Termiese geleidingsvermoë
0,0782 W/cm·K
Oksidasiestate
-3, -2, -1, 1, 2, 3, 4, 5, 6, 7
Toepassings
For over 2000 years, manganese dioxide has been used to make colorless glass.
Manganese dioxide is used as the cathode material in zinc-carbon and alkaline batteries.
Manganese also functions in the oxygen-evolving complex of photosynthetic plants.
The dioxide is also used in the preparation of oxygen and chlorine and in drying black paints.
Manganese dioxide is used as the cathode material in zinc-carbon and alkaline batteries.
Manganese also functions in the oxygen-evolving complex of photosynthetic plants.
The dioxide is also used in the preparation of oxygen and chlorine and in drying black paints.
Excess manganese, particularly inhalation of the powder, is toxic
Isotope
Stabiele Isotope
55MnOnstabiele Isotope
44Mn, 45Mn, 46Mn, 47Mn, 48Mn, 49Mn, 50Mn, 51Mn, 52Mn, 53Mn, 54Mn, 56Mn, 57Mn, 58Mn, 59Mn, 60Mn, 61Mn, 62Mn, 63Mn, 64Mn, 65Mn, 66Mn, 67Mn, 68Mn, 69Mn