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a molecule containing anything from thousands to hundreds of millions of atoms per molecule, a polymer, e.g. biological like proteins, nucleic acids or polysaccharides, or chemical like polythene
when a nucleus is unstable and emits particles and energy.
the stratosphere extends from a height of 10 km to 50 km above the surface of the Earth.
during hydrocracking a high hydrogen concentration (partial pressure) ensures that any shorter...