Question

name two metals which impart colour to the flame and give their colour also​

Answer 1

Answer:  Alkali metals impart characteristic colours to the flame due to low ionisation enthalpy, when an alkali metal or its salt is heated in a flame, the valence electrons are excited to higher energy level.

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Answer 2

Answer:

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.

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