Mangano
25
Mn
Grupo
7
Perio
4
Bloko
d
Protonoj
Elektronoj
Neŭtronoj
25
25
30
Ĝeneralaj Propraĵoj
Atoma Nombro
25
Atommaso
54,938045
Amasa Nombro
55
Kategorio
Transirmetaloj
Koloro
Arĝento
Radioaktiva
Ne
De la Latina vorto magnes, magneto, de magnetaj ecoj de piroluzito
Kristala Strukturo
Korpo Centrita Kubo
Historio
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.
Elektronoj per ŝelo
2, 8, 13, 2
Elektrona Agordo
[Ar] 3d5 4s2
Neanderthals may have used black manganese di oxide as a cosmetic 50,000 years ago
Fizikaj Propraĵoj
Fazo
Solido
Denso
7,44 g/cm3
Fandpunkto
1519,15 K | 1246 °C | 2274,8 °F
Bolpunkto
2334,15 K | 2061 °C | 3741,8 °F
Varmo de Fuzio
13,2 kJ/mol
Varmo de Vaporiĝo
220 kJ/mol
Specifa Varmo Kapacito
0,479 J/g·K
Krusta Abundo
0,11%
Universa Abundo
0,0008%
CAS Nombro
7439-96-5
PubChem Kunmetita Identiga Nombro
23930
Atomaj Propraĵoj
Atoma Radiuso
127 pm
Kovalenta Radiuso
139 pm
Elektronegativeco
1,55 (Pauling-skalo)
Potencialo de jonigo
7,434 eV
Atoma Volumo
7,4 cm3/mol
Termika Kondukto
0,0782 W/cm·K
Oksidaj Ŝtatoj
-3, -2, -1, 1, 2, 3, 4, 5, 6, 7
Aplikoj
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
Izotopoj
Stabilaj Izotopoj
55MnMalstabilaj Isotopoj
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