AP EAMCET · Chemistry · Structure of Atom

The spectrum of Helium is expected to be similar to that of____

A ${Li}^{+}$
B $H$
C $Na$
D ${He}^{+}$

Verified Solution

Answer & Solution

Correct Answer

(A) ${Li}^{+}$

Step-by-step Solution

Detailed explanation

According to the question the spectrum of helium is excepted to be similar like species having two electrons. So we know the concept of line spectrum which is depends on the number of electrons. Helium is having two electrons and also in Li+ there are two electrons. Species…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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