Which metal ion produces the light with the highest energy?

a. Na+
b. Ca+
c. K+
d. Ba2+

1 answer

Actually the question is quite broad; there are no indications of the kind of excitation sources used. Assuming we are talking about using flame emission, I think Na^+, K^+, and Ba^2+ leads to closed shells (noble gas structure)and that makes me think Ca^+ is the only one with an electron that could be moved easily to an outer shell.
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