Those elements impart colour to the flame on heating in it, the atoms of which require low energy for the ionisation (i.e., absorb energy in the visible region of spectrum). The elements of which of the following groups will impart colour to the flame ?

Those elements impart colour to the flame on heating in it, the atoms

1.	Those elements impart colour to the flame on heating in it, the atoms of which require low energy for the ionisation (i.e., absorb energy in the visible region of spectrum). The elements of which of the following groups will impart colour to the flame ?
Answer» 2 13 1 17 Solution :ELEMENTS of group 1 (alkali METALS) and elements of group 2 (alkaline earth metals) has 1 and 2 electrons in their valence shells and they have very LESS ionisation energies. Elements of group 1 and group 2 imparts colour during flame test.