Mangan
25
Mn
Grup
7
Periyot
4
Blok
d
Protonlar
Elektronlar
Nötronlar
25
25
30
Temel Özellikleri
Atom numarası
25
Atom ağırlığı
54,938045
Kütle Numarası
55
Kategori
Geçiş metalleri
Renk
Gümüşi
Radyoaktif
Hayir
From the Latin word magnes, magnet, from magnetic properties of pyrolusite
Kristal yapısı
Hacim merkezli kübik
Tarihi
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.
Enerji seviyesi başına Elektronlar
2, 8, 13, 2
Elektron dizilimi
[Ar] 3d5 4s2
Neanderthals may have used black manganese di oxide as a cosmetic 50,000 years ago
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
7,44 g/cm3
Ergime noktası
1519,15 K | 1246 °C | 2274,8 °F
Kaynama noktası
2334,15 K | 2061 °C | 3741,8 °F
Ergime ısısı
13,2 kJ/mol
Buharlaşma ısısı
220 kJ/mol
Isı kapasitesi
0,479 J/g·K
Dünya kabuğundaki bulunulabilirliği
0,11%
Evrendeki bulunulabilirliği
0,0008%
CAS Numarası
7439-96-5
PubChem CID Numarası
23930
Atom Özellikleri
Atom yarıçapı
127 pm
Kovalent yarıçapı
139 pm
Elektronegatifliği
1,55 (Pauling ölçeği)
İyonlaşma enerjisi
7,434 eV
Atomik Hacim
7,4 cm3/mol
Isıl iletkenlik
0,0782 W/cm·K
Yükseltgenme seviyeleri
-3, -2, -1, 1, 2, 3, 4, 5, 6, 7
Uygulamalar
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
İzotoplar
Kararlı izotoplar
55MnKararsız izotoplar
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