1. Tardigrade
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  3. Chemistry
  4. In He +ion sample, electrons make transition from fifth excited state to second state only, all different types of photons are observed. Then change in angular momentum of electrons producing the third highest energy photon is how much times of angular momentum of electron in the first orbit.

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Q. In $He ^{+}$ion sample, electrons make transition from fifth excited state to second state only, all different types of photons are observed. Then change in angular momentum of electrons producing the third highest energy photon is how much times of angular momentum of electron in the first orbit.

Structure of Atom

Solution:

image
$3rd$ highest line is $4 \rightarrow 2$
Hence, change in angular momentum is $2$ times of $\frac{h}{2 \pi}$.