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states that the p, d and f orbitals can only take on a second electron when all the equivalent orbitals in the same energy level contain at least one electron.
any process in which a substance reacts with oxygen to produce a significant rise in temperature...
a very small, negatively charged particle that moves around the nucleus of an atom.
the natural circulation of water on, above or below the surface of the Earth.
a temperature scale with zero at absolute zero 0 K = 273 0C.