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Magnésíọ̀mù |
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Pípè | /mæɡˈniːziəm/ (mag-NEE-zee-əm) |
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Ìhànsójú | shiny grey solid |
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Ìwúwo átọ̀mù Ar, std(Mg) | [24.304, 24.307] conventional: 24.305 |
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Magnésíọ̀mù ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 12 |
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Ẹgbẹ́ | group 2 (alkaline earth metals) |
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Àyè | àyè 3 |
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Àdìpọ̀ | Àdìpọ̀-s |
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Ẹ̀ka ẹ́límẹ́ntì | Alkaline earth metal |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Ne] 3s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 923 K (650 °C, 1202 °F) |
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Ígbà ìhó | 1363 K (1091 °C, 1994 °F) |
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Kíki (near r.t.) | 1.738 g/cm3 |
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when liquid (at m.p.) | 1.584 g/cm3 |
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Heat of fusion | 8.48 kJ/mol |
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Heat of | 128 kJ/mol |
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Molar heat capacity | 24.869 J/(mol·K) |
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pressure
P (Pa)
|
1
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10
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100
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1 k
|
10 k
|
100 k
|
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at T (K)
|
701
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773
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861
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971
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1132
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1361
|
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Atomic properties |
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Oxidation states | +1,[1] +2 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.31 |
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energies | |
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Atomic radius | empirical: 160 pm |
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Covalent radius | 141±7 pm |
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Van der Waals radius | 173 pm |
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Spectral lines of magnésíọ̀mù |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | hexagonal close-packed (hcp) |
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Speed of sound thin rod | (annealed) 4940 m/s (at r.t.) |
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Thermal expansion | 24.8 µm/(m·K) (at 25 °C) |
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Thermal conductivity | 156 W/(m·K) |
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Electrical resistivity | 43.9 n Ω·m (at 20 °C) |
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Magnetic ordering | paramagnetic |
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Young's modulus | 45 GPa |
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Shear modulus | 17 GPa |
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Bulk modulus | 45 GPa |
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Poisson ratio | 0.290 |
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Mohs hardness | 2.5 |
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Brinell hardness | 260 MPa |
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CAS Number | 7439-95-4 |
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History |
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Discovery | Joseph Black (1755) |
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First isolation | Humphry Davy (1808) |
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Main isotopes of magnésíọ̀mù |
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Àdàkọ:Category-inline | references |