Input interpretation
roentgenium (chemical element) | einsteinium (chemical element)
Periodic table location
Periodic table location
Images
Images
Basic elemental properties
![| roentgenium | einsteinium atomic symbol | Rg | Es atomic number | 111 | 99 short electronic configuration | [Rn]7s^15f^146d^10 | [Rn]7s^25f^11 Aufbau diagram | 6d 5f 7s | 5f 7s block | d | f group | 11 | period | 7 | 7 atomic mass | 281 u | 252 u half-life | 10 min | 471.6 days](../image_source/3bea69fcdf10c54525cf31b26324599c.png)
| roentgenium | einsteinium atomic symbol | Rg | Es atomic number | 111 | 99 short electronic configuration | [Rn]7s^15f^146d^10 | [Rn]7s^25f^11 Aufbau diagram | 6d 5f 7s | 5f 7s block | d | f group | 11 | period | 7 | 7 atomic mass | 281 u | 252 u half-life | 10 min | 471.6 days
Thermodynamic properties
| einsteinium phase at STP | solid melting point | 860 °C (properties at standard conditions)
Reactivity
| roentgenium | einsteinium valence | (unknown) | 4 electronegativity | | 1.3 first ionization energy | | 619 kJ/mol (kilojoules per mole) ionization energies | {} | 619 kJ/mol
Atomic properties
| roentgenium | einsteinium term symbol | ^2S_(1/2) | ^5I_(15/2) (electronic ground state properties)
Abundances
| roentgenium | einsteinium solar abundance | 0 mass% | 0 mass% meteorite abundance | 0 mass% | 0 mass% crust abundance | 0 mass% | 0 mass% ocean abundance | 0 mass% | 0 mass% human abundance | 0 mass% | 0 mass% solar molar abundance | 0 mol% | 0 mol% meteorite molar abundance | 0 mol% | 0 mol% ocean molar abundance | 0 mol% | 0 mol% crust molar abundance | 0 mol% | 0 mol% human molar abundance | 0 mol% | 0 mol%
Nuclear properties
| roentgenium | einsteinium half-life | 10 min | 471.6 days lifetime | 14.5 min | 1.86 yr specific radioactivity | 2.463×10^6 TBq/g | 40.64 TBq/g decay mode | alpha emission | alpha emission nuclear spin | | Es-241: 3/2^- | Es-243: 3/2^- | Es-245: 3/2^- | Es-246: 4^- | Es-247: 7/2^+ | Es-249: 7/2^+ | Es-250: 6^+ | Es-251: 3/2^- | Es-252: 5^- | Es-253: 7/2^+ | Es-254: 7^+ | Es-255: 7/2^+ | Es-257: 7/2^+ unstable isotopes | Rg-283 (10 min) | Rg-282 (200 s) | Rg-281 (60 s) | Rg-280 (10 s) | Rg-279 (3 s) | Rg-278 (1 s) | Rg-277 (1 s) | Rg-276 (100 ms) | Rg-275 (10 ms) | Rg-274 (5 ms) | Rg-273 (5 ms) | Rg-272 (2 ms) | Es-252 (471.6 days) | Es-254 (275.7 days) | Es-255 (39.8 days) | Es-253 (20.47 days) | Es-257 (7.8 days) | Es-251 (33 h) | Es-250 (8.6 h) | Es-249 (102.2 min) | Es-248 (27 min) | Es-256 (25.4 min) | Es-246 (7.67 min) | Es-247 (4.55 min) | Es-258 (200 s) | Es-245 (66 s) | Es-244 (37 s) | Es-243 (21 s) | Es-242 (13.5 s) | Es-241 (8 s) | Es-240 (1 s) neutron cross-section | (unknown) | 160 b
Identifiers
| roentgenium | einsteinium CAS number | 54386-24-2 | 7429-92-7 PubChem CID number | | 23913