Cobalt(II) bromide absorbs light of frequencies around \( 4.5\times 10^{14}Hz \). Describe why this is consistent with the observed colour of the compound, including a calculation in your answer. Use sections 1, 2 and 15 of the data booklet.
Cobalt(II) bromide absorbs light of frequencies around \( 4.5\times 10^{14}Hz \). Describe why this is consistent with the observed colour of the compound, including a calculation in your answer. Use sections 1, 2 and 15 of the data booklet.