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Grade: 12th pass

                        

need an explaination..need an explaination..................need an explaination...................need an explaination...................need an explaination

3 years ago

Answers : (1)

Arun
24742 Points
							
Be does not impart characteristic colour to flame because its atoms are comparatively smaller and the valance electrons are strongly attached to the nucleus. Therefore its ionisation energies is high and  needs large amount of energy for the excitation of their valence electrons to higher energy level which is usually not available in the Bunsen flame. So beryllium do not impart any colour to the flame.
Ca,Sr and Ba impart brick red, blood red and apple green colours respectively to the flame.
4 months ago
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