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a reaction in which heat is absorbed from the surroundings and the temperature of the reaction mixture decreases when more energy is taken in than it releases.
calculating the volume of a substance when the volume of another substance is given.
those properties that can change without changing the chemical nature of a substance.
rechargeable cells, such as the lead acid accumulator used in motor vehicles.
the electrons in the outermost occupied shell of an atom.
states that the p, d and f orbitals can only take on a second electron when all the equivalent...