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  4. Beryllium and magnesium do not impart any colour to the flame test. The reason behind this is

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Q. Beryllium and magnesium do not impart any colour to the flame test. The reason behind this is

The s-Block Elements

Solution:

The electrons in beryllium and magnesium are so tightly bounded with nucleus that they do not get excited by flame. This is because, these metals also have higher value of ionisation energy.
Hence, these metals do not impart colour to flame test.