Mangan

25
Mn
Kumpulan
7
Kala
4
Blok
d
Proton
Elektron
Neutron
25
25
30
Ciri-Ciri Am
Nombor atom
25
Berat atom
54.938045
Nombor jisim
55
Kategori
Logam peralihan
Warna
Perak
Radioaktif
Tidak
From the Latin word magnes, magnet, from magnetic properties of pyrolusite
Struktur hablur
Pusat Badan Kubik
Sejarah
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.
Bilangan elektron per petala
2, 8, 13, 2
Konfigurasi elektron
[Ar] 3d5 4s2
Mn
Neanderthals may have used black manganese di oxide as a cosmetic 50,000 years ago
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
7.44 g/cm3
Takat lebur
1519.15 K | 1246 °C | 2274.8 °F
Takat didih
2334.15 K | 2061 °C | 3741.8 °F
Haba pelakuran
13.2 kJ/mol
Haba pengewapan
220 kJ/mol
Muatan haba molar
0.479 J/g·K
Banyak pada kerak bumi
0.11%
Banyak pada alam semesta
0.0008%
Small
Kredit imej: Images-of-elements
Small pieces of manganese
Nombor CAS
7439-96-5
PubChem CID Number
23930
Ciri-Ciri Atom
Jejari atom
127 pm
Jejari kovalen
139 pm
Keelektronegatifan
1.55 (Skala Pauling)
Kebolehan mengion
7.434 eV
Isipadu atom
7.4 cm3/mol
Daya pengaliran terma
0.0782 W/cm·K
Keadaan pengoksidaan
-3, -2, -1, 1, 2, 3, 4, 5, 6, 7
Aplikasi
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.
Excess manganese, particularly inhalation of the powder, is toxic
Isotop
Isotop stabil
55Mn
Isotop tidak stabil
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