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Rubidium |
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Pípè | /ruːˈbɪdiəm/ (roo-BID-ee-əm) |
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Ìhànsójú | grey white |
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Ìwúwo átọ̀mù Ar, std(Rb) | 85.4678(3)[1] |
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Rubidium ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 37 |
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Ẹgbẹ́ | group 1: H and alkali metals |
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Àyè | àyè 5 |
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Àdìpọ̀ | Àdìpọ̀-s |
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Ẹ̀ka ẹ́límẹ́ntì | Alkali metal |
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Ìtò ẹ̀lẹ́ktrọ́nù | [Kr] 5s1 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 8, 1 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 312.46 K (39.31 °C, 102.76 °F) |
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Ígbà ìhó | 961 K (688 °C, 1270 °F) |
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Kíki (near r.t.) | 1.532 g/cm3 |
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when liquid (at m.p.) | 1.46 g/cm3 |
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Critical point | (extrapolated) 2093 K, 16 MPa |
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Heat of fusion | 2.19 kJ/mol |
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Heat of | 75.77 kJ/mol |
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Molar heat capacity | 31.060 J/(mol·K) |
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pressure
P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
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at T (K)
|
434
|
486
|
552
|
641
|
769
|
958
|
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Atomic properties |
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Oxidation states | −1, +1 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 0.82 |
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Atomic radius | empirical: 248 pm |
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Covalent radius | 220±9 pm |
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Van der Waals radius | 303 pm |
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Spectral lines of rubidium |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | (bcc) |
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Speed of sound thin rod | 1300 m/s (at 20 °C) |
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Thermal conductivity | 58.2 W/(m·K) |
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Electrical resistivity | 128 n Ω·m (at 20 °C) |
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Magnetic ordering | paramagnetic[2] |
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Young's modulus | 2.4 GPa |
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Bulk modulus | 2.5 GPa |
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Mohs hardness | 0.3 |
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Brinell hardness | 0.216 MPa |
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CAS Number | 7440-17-7 |
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Main isotopes of rubidium |
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Àdàkọ:Category-inline | references |