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What element has a hydrogen-like spectru...

What element has a hydrogen-like spectrum whose lines have wavelength four times shorter than those of atomic hydrogen?

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The correct Answer is:
`He^(+)`.
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OP TANDON-ATOMIC STRUCTURE -Practice Problems
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  2. A certain line of the Lyman series of hydrogen and a certain line of t...

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  3. What element has a hydrogen-like spectrum whose lines have wavelength ...

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  4. The binding energy of the electron in the ground state of He atom is e...

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  6. Find out the number of waves made by a Bohr's electron in one complet...

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  7. The wave number of first line in Balmer series of Hydrogen is 15,200cm...

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  8. An electron in H-atom in its ground state absorbs 1.5 times as much e...

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  9. The radius of the an orbit of hydrogen atom is 0.85nm . Calculate the ...

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  16. (a). A transition metal cation x^(3+) has magnetic momen sqrt(35) BM. ...

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  17. A photon of wavelength 4000Ã… A strikes a metal surface, then work fun...

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