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For example, two hydrogen atoms adjacent to the carbonyl group in cis-2,6-dimethylcyclohexanone are enantiotopic; they are related by an internal plane of symmetry passing through the carbonyl group, but deprotonation on one side of the carbonyl group or on the other will generate compounds that are enantiomers.
A nuclide is a species of an atom with a specific number of protons and neutrons in the nucleus, for example, carbon-13 with 6 protons and 7 neutrons. The nuclide concept (referring to individual nuclear species) emphasizes nuclear properties over chemical properties, whereas the isotope concept (grouping all atoms of each element) emphasizes chemical over nuclear.
Atoms are the smallest neutral particles into which matter can be divided by chemical reactions. An atom consists of a small, heavy nucleus surrounded by a relatively large, light cloud of electrons. An atomic nucleus consists of 1 or more protons and 0 or more neutrons. Protons and neutrons are, in turn, made of quarks.
The attraction of low-energy free protons to any electrons present in normal matter (such as the electrons in normal atoms) causes free protons to stop and to form a new chemical bond with an atom. Such a bond happens at any sufficiently "cold" temperature (that is, comparable to temperatures at the surface of the Sun) and with any type of atom.
Tens of thousands of California residents will decide whether to permanently relocate or rebuild their homes after the most destructive fires in Los Angeles’ history.
“Jonathan and I love the idea of domestic-made products,” real estate agent Drew Scott, one-half of the 6ft 5″ identical twins, told Bloomberg. “There is a balance we need to strike ...
In this theory, the deuterium nucleus with mass two and charge one would contain two protons and one nuclear electron. However, it was expected that the element hydrogen with a measured average atomic mass very close to 1 Da , the known mass of the proton, always has a nucleus composed of a single proton (a known particle), and could not ...
After gaining weight during the Covid-19 pandemic, Harvey Fierstein says that he’s now lost 120 lbs., — all thanks to weight-loss medication. In typically irreverent Fierstein fashion, the ...