د ويکيپېډيا، وړیا پوهنغونډ له خوا
Einsteinium, 99EsQuartz vial (9 mm diameter) containing ~300 micrograms of solid 253Es. The illumination produced is a result of the intense radiation from 253Es. |
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Pronunciation | /aɪnˈstaɪniəm/ eyen-STY-nee-əm |
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Appearance | silvery; glows blue in the dark |
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اټومي شمیره (Z) | 99 |
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گروپ, پیریود | group n/a, period 7 |
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بلاک | f-block |
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Element category | actinide |
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Mass number | 252 (most stable isotope) |
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Electron configuration | [Rn] 5f11 7s2 |
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Electrons per shell | 2, 8, 18, 32, 29, 8, 2 |
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حالت (at STP) | جامد |
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دويلې کيدو ټکى | 1133 K (860 °C, 1580 °F) |
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يشنا ټکی | 1269 K (996 °C, 1825 °F) (estimated) |
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Density near r.t. | 8.84 g/cm3 |
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Oxidation states | 2, 3, 4 |
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Electronegativity | Pauling scale: 1.3 |
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Ionization energies | |
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Crystal structure | face-centered cubic (fcc) |
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Magnetic ordering | paramagnetic |
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CAS Number | 7429-92-7 |
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Naming | after Albert Einstein |
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Discovery | Lawrence Berkeley National Laboratory (1952) |
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| references | in Wikidata |
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د سرچينو همدا لړليک په ليکنه کې نه ښکاري.