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-Why do most atoms form chemical bonds?
-What is the purpose of control in an experiment?

  • chemistry -

    Most atoms form chemical bonds because they can attain a more stable electron configuration, with lower overall energy stored in that configuration.

    The purpose of control is to have something to compare the results to.

  • chemistry -

    A. Atoms with incomplete valence shells (outer electron shells) lose, gain, or share electrons in a way that would give them a complete valence shell. That lowers potential energy and increases stability of atoms forming ionic or covalent bonds.
    B. The control in an experiment provides a standard of comparison for the the part of the experiment in which some factor is changed from its normal value or state (the control).

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