Uranium electronic configuration

Uranium is the fourth element of the actinide (SJ series. In the actinide series the electrons are more effectively shielded by the Is and 7p electrons relative to the 4f electrons (shielded by 6s, 6p) in the lanthanide (4p series. Thus, there is a greater spatial extension of 5f orbitals for actinides than 4f orbitals for lanthanides. This results in a small energy difference between and 5/ 6d7s electronic configurations, and a wider range of oxidation states is... 

Unsaturated, hydrocarbons, 342 Uranium compounds, 223 electron configuration, 415 oxidation number, 414 preparation, 35 Uranium hexafluoride, 35 Uranus, data on, 444 Urea, 434... 

It is possible to distinguish atoms by writing sets of quantum numbers for each of their electrons. However, writing quantum numbers for an atom such as uranium, which has 92 electrons, would be mind-bogglingly tedious. Fortunately, chemists have developed a shortcut to represent the number and orbital arrangements of electrons in each atom. As you will see shortly, these electron configurations, as they are called, are intimately connected to the structure and logic of the periodic table. 

Periodic Table Americium, http //www.chemicalelements.com/elements/am.html (accessed September 6> 2005). Periodic Table Plutonium, http //www.chemicalelements.com/elements/pu.html (accessed September 6> 2005). Periodic Table Protactinium, http //www.chemicalelements.com/elements/pa.html (accessed September 6> 2005). Periodic Table Thorium (accessed September 6> 2005).Periodic Table Uranium (accessed September 6, 2005).Periodic Table Electron Configuration, http //www.chemicalelements.com/ show/electronconfig.html (accessed November... 

Write the electron configurations of the chromium, molybdenum, tungsten, and uranium atoms. Why are the sizes of molybdenum and tungsten atoms almost the same Which oxidation states are exhibited by the most stable compounds of these elements (for example, their natural compounds) Explain the observed laws. 

For vanadium and chromium the first ionization energies are much lower than the first ionization energies of phosphorus and sulphur, respectively. This explains the high heats of formation of VC13 and CrCl3. In uranium, the tetravalent state is more stable than that in tungsten because uranium as an actinide has a different electron configuration. 

Write the electron configuration for uranium, U (atomic number 92), in abbreviated notation. 

EINSTENIUM. CAS 7429-92-71. Chemical element symbol Es, at. no. 99. at. wt. 254 (mass number of the most stable isotope), radioactive metal of the Actinide series, also one of the Transuranium elements. Both einsteinium and fermium were formed tit a thermonuclear explosion that occurred in the South Pacific in 1952. The elements were identified by scientists from the University of California s Radiation Laboratory- the Argonnc National Laboratory, and the I. os Alamos Scientific Laboratory. It was observed that very heavy uranium isotopes which resulted from the action of the instantaneous neutron dux on uranium (contained in the explosive device) decayed to form Es and Fm. The probable electronic configuration of Es is... 

I he atomic wcighi varies because of natural variations in the isotopic composition of the element, caused by the various isotopes having different origins - I h is the end product of the thorium decay scries, while Ph and " Pb arise Irom uranium as end products of the actinium and radium series respectively. Lead-204 has no existing natural radioactive precursors. Electronic configuration l.v 2s lfc22/j"3v 3//,3i/l"4v- 4/, 4l/" 4/ IJ5v- 5/ "5t/l"bv />-. Ionic radius Pb I.IX A. Pb 1 0.7(1 A. Metallic radius 1.7502 A. Covalent radius (ip i 1.44 A. First ionization potential 7.415 cV second. 14.17 eV. Oxidation... 

The actinides are unique in that their nuclear structures are more important than their electron configurations. Because the nuclei of actinides are unstable and spontaneously break apart, all actinides are radioactive. The best-known actinide is uranium. 

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