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Elements and atoms

It is hardly possible in chemistry to introduce a contrast between elements and simple bodies, as the definition of element since Lavoisier is based on the simple body. It seems to me to be even less apt simply to equate the terms element/atom and simple body/molecule, respectively for apart from the fact that there are simple bodies whose molecules are single atoms, molecules and atoms belong indubitably to one and the same group of scientific concepts, while the essential difference between element and simple body in the Men-deleeffian sense of the words, lies in their belonging to quite different spheres in epistemology ([33], p 57). [Pg.138]

During the last few years the study of spectra of heavy and superheavy elements (atoms and ions) has been of great interest for further development in atomic and nuclear theories [1-12]. Theoretical methods used to calculate the spectroscopic characteristics of heavy and superheavy ions may be divided into... [Pg.285]

ELEMENTS. ATOMS, AND GROUP OF ATOMS Names and Symbols of Atoms... [Pg.1037]

When M = Sn the disproportionation of the radical pair becomes the main reaction pathway, while for M = Ge a recombination of the pair is also possible. Undoubtedly, this difference is caused by the influence of the element atom, and this is in agreement with the evidences obtained earlier that the effect of germanium-containing substituents on the radical addition reactions is distinctly different from that of tin-containing groups47,48. [Pg.610]

The identity of an element depends on the number of protons in the nucleus of the atom. This value is called the atomic number and it is sometimes written as a subscript before the symbol for the corresponding element. Atoms and ions of a given element that differ in number of neutrons have a different mass and are called isotopes. A nucleus with a specified number of protons and neutrons is called a nuclide, and a nuclear particle, either a proton or neutron, may be called a nucleon. The total number of nucleons is called the mass number and may be written as a superscript before the atomic symbol. [Pg.66]

Chemical Foundations Elements, Atoms, and Ions Chapter 3 49... [Pg.49]

Relativistic methods used for calculations of the electronic structures of the heaviest element atoms and molecules... [Pg.15]


See other pages where Elements and atoms is mentioned: [Pg.47]    [Pg.283]    [Pg.190]    [Pg.101]    [Pg.127]    [Pg.33]    [Pg.190]    [Pg.3]    [Pg.308]    [Pg.1]    [Pg.48]    [Pg.844]    [Pg.1612]    [Pg.178]   
See also in sourсe #XX -- [ Pg.47 , Pg.47 , Pg.49 ]

See also in sourсe #XX -- [ Pg.47 , Pg.47 , Pg.49 ]

See also in sourсe #XX -- [ Pg.44 ]




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