10.11. Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?
10.11. Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?
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1 Answer
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Due to small size, the ionization enthalpies of Be and Mg are much higher than those of other alkaline earth metals. Therefore, a large amount of energy is needed to excite their valence electron, and that's why they do not impart colour to the flame.
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