Results 241 to 250 of about 882,490 (296)

Relating Functional Groups to the Periodic Table

Journal of Chemical Education, 2009
An introduction to organic chemistry functional groups and their ionic variants is presented. Functional groups are ordered by the position of their specific (hetero) atom in the periodic table. Lewis structures are compared with their corresponding condensed formulas.
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The group VIII platinum-group metals and the Periodic Table

Foundations of Chemistry, 2009
The six platinum group metals (pgms: ruthenium, rhodium, palladium, osmium, iridium and platinum) posed a number of problems for 19th-century chemists, including Mendeleev, for their Periodic classification. This account discusses the discovery of the pgms, the determination of their atomic weights and their classification.
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Regularities of Vaporization of Periodic Table Group IVA Element Phosphates

Glass Physics and Chemistry, 2001
The vaporization of glass-forming phosphates of the periodic table Group IVA elements is studied by high-temperature mass spectrometry. Analyses of qualitative and quantitative vapor compositions have revealed a number of regularities that allow the prediction of the character of the vaporization of polyvalent element phosphates.
S. I. Lopatin, G. A. Semenov
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What Elements Belong in Group 3 of the Periodic Table?

2018
The question of precisely which elements should be placed in group 3 of the periodic table has been debated from time to time with apparently no resolution. This question has also received a recent impetus from several science news articles following an article in Nature Magazine in which the measurement of the ionization energy of the element ...
Eric R. Scerri, William Parsons
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Peroxides of the Group Two Elements of the Periodic Table

1966
All elements of the second group, with the exception of beryllium [1], form peroxide compounds. Peroxides of calcium, strontium, and barium belong to the M2+O2 2- type; while peroxides of magnesium, zinc, and cadmium, of general formula MO2 • xH2O, probably belong to the HO—M—OOH type where the covalent bond between the hydroperoxyl group and the metal
Il’ya Ivanovich Vol’nov, A. W. Petrocelli   +1 more
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Peroxides of the Group One Metals of the Periodic Table

1966
All alkali metals form peroxides. The peroxides of all the alkali metals, with the exception of lithium, can be synthesized by direct oxidation of the metal with oxygen at atmospheric pressure. The reactivities of sodium, potassium, rubidium, and cesium result from the fact that these metals have large atomic radii and low ionization potentials ...
Il’ya Ivanovich Vol’nov, A. W. Petrocelli   +1 more
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Lanthanides and actinides among other groups of elements of the periodic table

Radiochemistry, 2007
The extent to which actinides (An) are similar to other elements of the periodic table is discussed. Actinides show certain similarity with transition metals in trends in variation of the stability of the highest and lowest oxidation states with increasing atomic number.
N. B. Mikheev, S. A. Kulyukhin, I. V. Melikhov   +2 more
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The periodic table: The 6d-5f mixed transition group

Journal of Chemical Education, 1952
With relatively few modifications, the Bohr-type periodic table presented by Glocker and Popov can be made to reflect more instructively the rather complex relationships obtained in the neighborhood of the 4f or gadolinium transition group and, more importantly, in the 6d-5f sequence extending from actinium through the region of uranium and the ...
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