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atomic mass unit â measured as 1 twelfth of a C-12 atom.
the difference between the energy absorbed to break bonds and the energy transferred to the...
a group of elements that are non-reactive, monatomic gases (Group 0, 8 or 18).
a molecule that is so big that we can see it, e.g. diamond.
small electrical cells such as those in watches, pacemakers, hearing aids and calculators.