Elemental data density

Elemental Phosphorus—Density and Bond Length Data... 

If the elements Cn and FI (element 114) have a noble-gas like character [54], then, in a fictitious solid state, they would form non-conducting colorless crystals. A physisorptive type of adsorption may occur and their adsorption properties, for example on quartz, can be calculated with this method, see Table 3. For physi-sorbed noble gas atoms a roughly uniform distance to different surfaces of about 2.47 0.2 A was deduced from experimental results [47]. A predicted value of the adsorption properties of HSO4 was based on this model in [37]. In conjunction with molecular and elemental data, which were calculated using density functional theory, this model yields valuable predictive results see chapter Theoretical Chemistry of the Heaviest Elements . 

Under testing conditions the fuel element to be tested is placed at the stand. Then it is moved into the control unit and gripped with a collet. First the density distribution of the vibro-compacted fuel along the total length of the fuel element is tested. Proceeding from the obtained data the section to be investigated in detail is chosen and a tomogramm of this section is obtained. 

The data in Table 7.1 show that, as expected, density, ionic radius, and atomic radius increase with increasing atomic number. However, we should also note the marked differences in m.p. and liquid range of boron compared with the other Group III elements here we have the first indication of the very large difference in properties between boron and the other elements in the group. Boron is in fact a non-metal, whilst the remaining elements are metals with closely related properties. 

Iridium is not attacked by any of the acids nor by aqua regia, but is attacked by molten salts, such as NaCl and NaCN. The specific gravity of iridium is only very slightly lower than osmium, which is generally credited as the heaviest known element. Calculations of the densities of iridium and osmium from the space lattices give values of 22.65 and 22.61 g/cm 3, respectively. These values may be more reliable than actual physical measurements. At present, therefore, we know that either iridium or osmium is the densest known element, but the data do not yet allow selection between the two. 

Calculate the atomic radius of each of the following elements from the data given (a) platinum, fee structure, density 21.450 g-cm 3 (b) tantalum, bcc structure, density 16.654 g-cm-3. 

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