Einsteinium, 99Es |
Einsteinium |
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Pronunciation | (eyen-STY-nee-əm) |
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Appearance | siller-coloured |
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Mass number | [252] |
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Einsteinium in the periodic cairt |
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Atomic nummer (Z) | 99 |
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Group | group n/a |
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Period | period 7 |
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Block | f-block |
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Element category | Actinide |
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Electron confeeguration | [Rn] 5f11 7s2 |
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Electrons per shell | 2, 8, 18, 32, 29, 8, 2 |
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Pheesical properties |
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Phase at STP | solit |
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Meltin pynt | 1133 K (860 °C, 1580 °F) |
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Bylin pynt | 1269 K (996 °C, 1825 °F) (estimatit) |
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Density (near r.t.) | 8.84 g/cm3 |
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Atomic properties |
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Oxidation states | +2, +3, +4 |
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Electronegativity | Pauling scale: 1.3 |
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Ionisation energies | |
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Spectral lines o einsteinium |
Ither properties |
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Naitural occurrence | synthetic |
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Creestal structur | face-centred cubic (fcc) |
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Magnetic orderin | paramagnetic |
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CAS Nummer | 7429-92-7 |
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History |
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Namin | after Albert Einstein |
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Diskivery | Lawrence Berkeley Naitional Laboratory (1952) |
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Main isotopes o einsteinium |
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| references |
style="text-align:left"|
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in
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calc from C
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diff
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report
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ref
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C
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860
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—
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—
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K
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1133
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1130
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3
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delta
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F
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1580
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1580
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0
|
|
|
WD
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String Module Error: Target string is empty !
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input
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C: 860, K: 1133, F: 1580
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comment
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|
style="text-align:left"|
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|
in
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calc from C
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diff
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report
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ref
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C
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996
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—
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—
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|
|
K
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1269
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1269
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0
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F
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1825
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1825
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0
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|
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WD
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String Module Error: Target string is empty !
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input
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C: 996, K: 1269, F: 1825
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comment
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(estimatit)
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References
Thir references will appear in the airticle, but this list appears anerly on this page.