Manganese Mn 25 by Yudnina NH 9i.25

Physical

Phase : Solid

Density : 7.21 g·cm−3

Liquid Density :5.95 g·cm−3

Melting Point :1519 [or 1246 °C (2275 °F)] K

Boiling Point : 2334 [or 2061 °C (3742 °F)] K

Liquid range: 815 K

Heat of fusion : 12.91 kJ·mol−1

Heat of vaporization: 221 kJ·mol−1

Specific heat capacity :(25 °C) 26.32 J·mol−1·K−1

Electrical resistivity: 144 10-8 Ω m; or mΩ cm

Mineral hardness: 6.0 (no units)

Brinell hardness: 196 MN m-2

Thermal conductivity: 7.8 W m-1 K-1

Coefficient of linear thermal expansion:21.7 x 10-6 K-1

Young's modulus: 198 GPa

Bulk modulus: 120 GPa

Application

PROPERTIES

DiscovererJohann G. Gahn

Discovery Location: Stockholm Sweden

Discovery Year: 1774

Who Where When

General

In other wordLatin: mangnes (magnet); Ital. manganese.

Pronunciation/ˈmæŋɡəniːz/ MANG-gən-neez

Standard atomic weight54.938045(5) g·mol−1

Group, period, block 7, 4, d

Element category transition metal

Electrons per shell2, 8, 13, 2 (Image)

Electron configuration[Ar] 4s2 3d5

25

MANGANESE

Manganese has atomic number 25 (my absent number) has Mn as symbol.

Discovered by Mr. Johan Gahn in Sweden at 1774.

Usually used to make iron, armor, ceramics, batteries,safes and etc. It also can help the

people who has osteoporosis and a women who has trouble while pramenstuation

syndrom(PSM)

But it poisonius. Routes of Exposure: Inhalation; Ingestion and Target Organs:

Respiratory system, central nervous system, blood, kidneys

the list of disease that cause of manganese

- Fatness - Iintolerances’ glucose

- Blood Coagulation - Skin problem

- Downing cholesterol rate - bone disorder

- Birth defects

iron armor steel

batteries axles rail switches

safes plows ceramics

component in each television set

help to prevent osteoporosis and reduces phenomena that troubles while pramenstruasi's syndrome (PMS)

counteracting oksidatif tint greenness at glass

because of much iron’s contamination