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the time required for half the atoms present in an object have undergone radioactive decay and changed into something else.
the substance that liberates electrons (undergoes oxidation) and causes the other substance to...
to make neutral. An acid-base reaction which produces a salt and water.
a group of organic compounds in which a halogen has replaced a hydrogen atom.
a process that releases energy from the system. This decreases the internal energy of the system...
a substance that can donate or accept a proton. It can act as an acid or a base.