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Californium (Cf)
Has no stable isotopes. A standard atomic mass cannot be given. General Name, Symbol, Number californium, Cf, 98 Chemical series actinides Group, Period, Block ?, 7, f Appearance unknown, probably silvery white or metallic gray Atomic mass (251) g/mol Electron configuration [Rn] 5f10 7s2 Electrons per shell 2, 8, 18, 32, 28, 8, 2 Physical properties Phase solid Density (near r. ...
Table
| Z(p) | N(n) | isotopic mass (u) | nuclide
symbol | representative
isotopic
composition
(mole fraction) | range of natural
variation
(mole fraction) | | 98 | 139 | 237.06207(54)# | Cf-237 | | | | 98 | 140 | 238.06141(43)# | Cf-238 | | | | 98 | 141 | 239.06242(23)# | Cf-239 | | | | 98 | 142 | 240.06230(22)# | Cf-240 | | | | 98 | 143 | 241.06373(27)# | Cf-241 | | | | 98 | 144 | 242.06370(4) | Cf-242 | | | | 98 | 145 | 243.06543(15)# | Cf-243 | | | | 98 | 146 | 244.066001(3) | Cf-244 | | | | 98 | 147 | 245.068049(3) | Cf-245 | | | | 98 | 148 | 246.0688053(22) | Cf-246 | | | | 98 | 149 | 247.071001(9) | Cf-247 | | | | 98 | 150 | 248.072185(6) | Cf-248 | | | | 98 | 151 | 249.0748535(24) | Cf-249 | | | | 98 | 152 | 250.0764061(22) | Cf-250 | | | | 98 | 153 | 251.079587(5) | Cf-251 | | | | 98 | 154 | 252.081626(5) | Cf-252 | | | | 98 | 155 | 253.085133(7) | Cf-253 | | | | 98 | 156 | 254.087323(13) | Cf-254 | | | | 98 | 157 | 255.09105(22)# | Cf-255 | | | | 98 | 158 | 256.09344(32)# | Cf-256 | | | Properties In physics, the proton (Greek proton = first) is a subatomic particle with an electric charge of one positive fundamental unit (1. ...
Properties In physics, the neutron is a subatomic particle with no net electric charge and a mass of 939. ...
Notes - Values marked # are not purely derived from experimental data, but at least partly from systematic trends.
- Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values from Ame2003 denote one standard deviation. Values from IUPAC are expanded uncertainties.
References - Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from Atomic Weights of the Elements: Review 2000 (IUPAC Technical Report). Pure Appl. Chem., Vol. 75, No. 6, pp. 683-800, (2003).
Einsteinium (Es) Has no stable isotopes. ...
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