Chemical element, symbol Mg and atomic number మూస:SHORTDESC:Chemical element, symbol Mg and atomic number
మెగ్నీషియం, 00Mg |
|
Pronunciation | (mag-NEE-zee-əm) |
---|
Appearance | shiny grey solid |
---|
|
|
| - [24.304, 24.307][1]
- 24.305±0.002 (abridged)[2]
|
---|
|
|
|
Group | మూస:Infobox element/symbol-to-group/format |
---|
Period | period 3 |
---|
Block | s-block |
---|
Electron configuration | [Ne] 3s2 |
---|
Electrons per shell | 2, 8, 2 |
---|
|
Phase at STP | solid |
---|
Melting point | 923 K (650 °C, 1202 °F) |
---|
Boiling point | 1363 K (1091 °C, 1994 °F) |
---|
Density (near r.t.) | 1.738 g/cm3 |
---|
when liquid (at m.p.) | 1.584 g/cm3 |
---|
Heat of fusion | 8.48 kJ/mol |
---|
Heat of vaporization | 128 kJ/mol |
---|
Molar heat capacity | 24.869 J/(mol·K) |
---|
Vapor pressureP (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
---|
at T (K) | 701 | 773 | 861 | 971 | 1132 | 1361 |
---|
|
|
Oxidation states | 0,[3] +1,[4] +2 (a strongly basic oxide) |
---|
Electronegativity | Pauling scale: 1.31 |
---|
Ionization energies | |
---|
Atomic radius | empirical: 160 pm |
---|
Covalent radius | 141±7 pm |
---|
Van der Waals radius | 173 pm |
---|
Spectral lines of మెగ్నీషియం |
|
Natural occurrence | primordial |
---|
Crystal structure | hexagonal close-packed (hcp) |
---|
Speed of sound thin rod | (annealed) 4940 m/s (at r.t.) |
---|
Thermal expansion | 24.8 µm/(m⋅K) (at 25 °C) |
---|
Thermal conductivity | 156 W/(m⋅K) |
---|
Electrical resistivity | 43.9 n Ω⋅m (at 20 °C) |
---|
Magnetic ordering | paramagnetic |
---|
Young's modulus | 45 GPa |
---|
Shear modulus | 17 GPa |
---|
Bulk modulus | 45 GPa |
---|
Poisson ratio | 0.290 |
---|
Mohs hardness | 2.5 |
---|
Brinell hardness | 260 MPa |
---|
CAS Number | 7439-95-4 |
---|
|
Discovery | Joseph Black (1755) |
---|
First isolation | Humphry Davy (1808) |
---|
|
Template:infobox మెగ్నీషియం isotopes does not exist |
Category: మెగ్నీషియం | references |
References