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when radioactive particles collide with air molecules, they can cause the molecules to lose or gain electrons and therefore become electrically charged.
compounds that are different colours in acid and alkali environments.
various substances that are added to polymers to reduce their cost and to improve their physical...
a molecule that is so big that we can see it, e.g. diamond.
a group of organic molecules formed by condensation of two alcohol molecules.
a temperature scale with zero at absolute zero 0 K = 273 0C.