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In a hydrogen atom and He ion, both are in the second excited state. If [tex]l_1[/tex] and [tex]l_2[/tex] are their respective angular momenta, then:

a. [tex]l_1 > l_2[/tex]
b. [tex]l_1 > l_2[/tex]
c. [tex]l_1 < l_2[/tex]
d. Relationship cannot be determined

Answer :

Final answer:

The angular momentum of an electron in a hydrogen atom and a He ion in the second excited state is determined by the orbital angular momentum quantum number. In this case, both have a quantum number of 1, so the relationship between their angular momenta cannot be determined. The correct answer is d. Relationship cannot be determined.

Explanation:

The angular momentum of an electron in a hydrogen atom and a He ion in the second excited state can be determined by the formula L=sqrt(l(l+1))ħ, where l is the orbital angular momentum quantum number.

For the hydrogen atom, the second excited state corresponds to n=2, so l can be either 0 or 1.

Therefore, l₁=1.

For the He ion, the second excited state also corresponds to n=2, so l₂ can also be either 0 or 1.

Therefore, l₂=1.

Since l₁=l₂=1, the answer is d. Relationship cannot be determined.

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