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List of inorganic compounds. ... (only simple oxides, oxyhalides, and related compounds, not hydroxides, carbonates, acids, or other compounds listed elsewhere) P
This is an index of lists of molecules (i.e. by year, number of atoms, etc.). Millions of molecules have existed in the universe since before the formation of Earth. Three of them, carbon dioxide, water and oxygen were necessary for the growth of life.
The only stable nuclides having an odd number of protons and an odd number of neutrons are hydrogen-2, lithium-6, boron-10, nitrogen-14 and (observationally) tantalum-180m. This is because the mass–energy of such atoms is usually higher than that of their neighbors on the same isobaric chain, so most of them are unstable to beta decay .
These baryons (protons, neutrons, hyperons, etc.) which comprise the nucleus are called nucleons. Each type of nucleus is called a "nuclide", and each nuclide is defined by the specific number of each type of nucleon. "Isotopes" are nuclides which have the same number of protons but differing numbers of neutrons.
This list includes substances that boil just above standard condition temperatures. Numbers are boiling temperatures in °C. 1,1,2,2,3-Pentafluoropropane 25–26 °C [151] [3] Dimethoxyborane 25.9 °C; 1,4-Pentadiene 25.9 °C; 2-Bromo-1,1,1-trifluoroethane 26 °C; 1,2-Difluoroethane 26 °C; Hydrogen cyanide 26 °C; Trimethylgermane 26.2 °C [96]
An atomic nucleus is formed by a number of protons, Z (the atomic number), and a number of neutrons, N (the neutron number), bound together by the nuclear force. Protons and neutrons each have a mass of approximately one dalton. The atomic number determines the chemical properties of the atom, and the neutron number determines the isotope or ...
14 N is one of the five stable odd–odd nuclides (a nuclide having an odd number of protons and neutrons); the other four are 2 H, 6 Li, 10 B, and 180m Ta. [ 34 ] The relative abundance of 14 N and 15 N is practically constant in the atmosphere but can vary elsewhere, due to natural isotopic fractionation from biological redox reactions and ...
The study of molecules by molecular physics and theoretical chemistry is largely based on quantum mechanics and is essential for the understanding of the chemical bond. The simplest of molecules is the hydrogen molecule-ion, H 2 +, and the simplest of all the chemical bonds is the one-electron bond.