Which alkali metal during flame test will sho | vedclass

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Question

(A) The flame colors of the given alkali metals are:
$Li$ (Lithium): Crimson red flame $(\lambda \approx 670 \ nm)$
$Na$ (Sodium): Golden yellow fla

Vedclass · Accepted Answer

$Li$

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(A) The flame colors of the given alkali metals are:
$Li$ (Lithium): Crimson red flame $(\lambda \approx 670 \ nm)$
$Na$ (Sodium): Golden yellow flame $(\lambda \approx 589 \ nm)$
$K$ (Potassium): Violet flame $(\lambda \approx 404 \ nm)$
$Cs$ (Cesium): Blue flame $(\lambda \approx 455 \ nm)$
Since the wavelength $(\lambda)$ is inversely proportional to the energy of the emitted light,the color with the lowest energy corresponds to the maximum wavelength.
Among the given options,the crimson red color of $Li$ has the longest wavelength.

Which alkali metal during flame test will show color corresponding to maximum wavelength?

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