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| Strontium |
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| Pípè | /ˈstrɒnʃiəm,_ʔtiəm/ (STRON-shee-əm-,_--tee-əm) |
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| Ìhànsójú | silvery white metallic |
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| Ìwúwo átọ̀mù Ar, std(Sr) | 87.62(1)[1] |
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| Strontium ní orí tábìlì àyè |
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| Nọ́mbà átọ̀mù (Z) | 38 |
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| Ẹgbẹ́ | group 2 (alkaline earth metals) |
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| Àyè | àyè 5 |
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| Àdìpọ̀ | Àdìpọ̀-s |
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| Ẹ̀ka ẹ́límẹ́ntì | Alkaline earth metal |
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| Ìtò ẹ̀lẹ́ktrọ́nù | [Kr] 5s2 |
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| Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 8, 2 |
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| Àwọn ohun ìní ara |
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| Ìfarahàn at STP | solid |
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| Ìgbà ìyọ́ | 1050 K (777 °C, 1431 °F) |
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| Ígbà ìhó | 1655 K (1382 °C, 2520 °F) |
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| Kíki (near r.t.) | 2.64 g/cm3 |
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| when liquid (at m.p.) | 2.375 g/cm3 |
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| Heat of fusion | 7.43 kJ/mol |
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| Heat of | 136.9 kJ/mol |
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| Molar heat capacity | 26.4 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) | 796 | 882 | 990 | 1139 | 1345 | 1646 |
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| Atomic properties |
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| Oxidation states | +1,[2] +2 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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| Electronegativity | Pauling scale: 0.95 |
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| Atomic radius | empirical: 215 pm |
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| Covalent radius | 195±10 pm |
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| Van der Waals radius | 249 pm |
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 Color lines in a spectral rangeSpectral lines of strontium |
| Other properties |
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| Natural occurrence | primordial |
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| Crystal structure | (fcc) |
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| Thermal expansion | 22.5 µm/(m·K) (at 25 °C) |
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| Thermal conductivity | 35.4 W/(m·K) |
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| Electrical resistivity | 132 n Ω·m (at 20 °C) |
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| Magnetic ordering | paramagnetic |
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| Shear modulus | 6.1 GPa |
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| Poisson ratio | 0.28 |
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| Mohs hardness | 1.5 |
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| CAS Number | 7440-24-6 |
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| Main isotopes of strontium |
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| Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
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| 82Sr | syn | 25.36 d | ε | - | 82Rb | | 83Sr | syn | 1.35 d | ε | - | 83Rb | | β+ | 1.23 | 83Rb | | γ | 0.76, 0.36 | - | | 84Sr | 0.56% | 84Sr is stable with 46 neutrons | | 85Sr | syn | 64.84 d | ε | - | 85Rb | | γ | 0.514D | - | | 86Sr | 9.86% | 86Sr is stable with 48 neutrons | | 87Sr | 7.0% | 87Sr is stable with 49 neutrons | | 88Sr | 82.58% | 88Sr is stable with 50 neutrons | | 89Sr | syn | 50.52 d | ε | 1.49 | 89Rb | | β− | 0.909D | 89Y | | 90Sr | trace | 28.90 y | β− | 0.546 | 90Y |
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Àdàkọ:Category-inline
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