Why do Be and Mg not impart colour to flame?

Why do Be and Mg not impart colour to flame?

  1. A

    Due to high ionisation energies

  2. B

    weak attraction between nuclei and valence electrons

  3. C

    The energy of Bunsen burner flame  is more than sufficient energy to excite the electrons

  4. D

    None of the above

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    Solution:

    Due to small size and high ionization energy of Be and Mg.

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