Berlium and magnesium do not give colour to flame where as other alkaline earth metal do so.why?

Berlium and magnesium do not give colour to flame where as other alkal

1.	Berlium and magnesium do not give colour to flame where as other alkaline earth metal do so.why?
Answer» Beryllium and magnesium atoms are smaller in size and their electrons are strongly bound to the nucleus. They need large amounts of energy for excitation of electrons to higher energy levels which is not available in the bunsen flame. So they do not impart colour to the flame.