on heating alkali metals and their salts a characteristic colour to an oxidising flame is formed.so what colour of flame is obtained from francium
Dear student
Please find the solution to the asked query:
The alkali metals have one electron in their outermost shell. Since the alkali metals have very low ionisation energies, so the energy of the Bunsen flame is sufficient to excite the valence electrons of these elements to some higher energy states. When these electrons come back to the ground state, they emit radiation which falls in the visible region of the electromagnetic spectrum. So, characteristic flame coloration are imparted.
Francium does not show any coloration in the flame.
This is because it is highly radioactive in nature and available in trace quantities. So it cannot be handled with ease.
Hope this information will clear your doubts regarding the topic. If you have any other doubts please ask here on the forum and our experts will try to solve them as soon as possible.
Regards
Please find the solution to the asked query:
The alkali metals have one electron in their outermost shell. Since the alkali metals have very low ionisation energies, so the energy of the Bunsen flame is sufficient to excite the valence electrons of these elements to some higher energy states. When these electrons come back to the ground state, they emit radiation which falls in the visible region of the electromagnetic spectrum. So, characteristic flame coloration are imparted.
Francium does not show any coloration in the flame.
This is because it is highly radioactive in nature and available in trace quantities. So it cannot be handled with ease.
Hope this information will clear your doubts regarding the topic. If you have any other doubts please ask here on the forum and our experts will try to solve them as soon as possible.
Regards