Caesium atom

This description would assign to the caesium atom in the caesium fluoride crystal a resultant charge + and to the fluorine atom a charge — It has seemed to me likely that in general all of the atoms in the complexes that constitute stable chemical substances have resultant electrical charges smaller than those shown by these most electropositive and electronegative atoms in their compounds with one another, and I have accordingly formulated the postulate of the essential electrical neutrality of atoms namely, that the electronic structure of substances is... 

The structure of Helvite, Mn CBeSiOJjS, has been reported. The tetrahedral manganese ii) ions are bonded to one sulphur and three oxygen atoms. M2Mn3S4 (M = Rb or Cs) have been prepared by reactions in the molten state under nitrogen. An X-ray study on the caesium compound showed the manganese and caesium atoms to be arranged in layers separated by layers of sulphur atoms. ... 

T. Kraemer, M. Mark, P. Waldburger, J.G. Danzl, C. Chin, B. Engeser, et al., Evidence for Efimov quantum states in an ultracold gas of caesium atoms, Nature 440 (2006) 315. 

Figure 19 Cooperative binding of two uranyl cations and a caesium atom within a Bu -calix[6]arene.

This is due to the fact that at longer time intervals, the caesium atomic beam magnetic resonance clock is more accurate. For example, modem commercial Cs clocks have reported stabilities of about 3 parts in lo at 10 days (9 x 10 s) [5],... 

Basic zeolites were prepared by in situ formation of caesium oxide by calcination of the parent acetate loaded in an increasing amount up to 26 caesium atoms per unit cell. X-ray diffraction and BET studies are consistent with good crystallinity and site accessibility retainings. CO2 TPD results show homogeneous location of the basic species inside the pores with one caesium oxide per supercage. The results are fairly correlated with the initial rates of the Knoevenagel reaction of benzaldehyde and ethylcyanoacetate. These basic solids provide well-adapted selective microporous catalysts for condensation reaction. 

Although the simplification is rather drastic, it may still yield a qualitatively instructive picture for the solid state, the famous Sommerfeld model of the free electrons [53] with its many useful conclusions belongs to this class of theories. Quantitatively, however, a Hamilton operator as given in Equation (2.68) does not lead anywhere because it is far too primitive for chemical questions, which can be easily illustrated for, say, the caesium atom. The above hi obviously means that the 6s valence electron moves in a nuclear potential generated by 55 protons but this very electron does not sense the remaining 54 core-like electrons which (should) lie deeper in energy, which must be quantitatively incorrect. 

The largest atom is the caesium atom. The reason is a high principal quantum number for the valence orbital, while at the same time, screening is high since all other electrons are located in the inner shells. 

This definition refers to a caesium atom at rest at a temperature of 0 K. 

The second is the duration of 9 192631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom. This definition refers to a caesium atom at rest at a temperature of 0 K. 

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