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the amount of energy required to break a specific bond or the energy released when a specific bond is formed.
a diagram that shows the electrons in the outermost occupied shell of an atom as dots or crosses...
electrons that have been emitted from the nucleus of an atom of a radioactive element.
the time required for half the atoms present in an object have undergone radioactive decay and...
types of chemical âunitsâ â could be atoms, molecules, molecular fragments, simple or...