1.

The shortest wavelength of the Brackett series of a hydrogen-like atom (atomic number of `Z` ) is the same as the shortest wavelength of the Balmer series of hydrogen atom. The value of `z` isA. 3B. 4C. 5D. 2

Answer» Correct Answer - D
According to the question,
`" " lambda_(("shortest"))"Brackett"=(lambda_("shortest"))"Balmer"`"
`rArr" "(1)/((lambda_("shortest"))"Brackett")=(1)/((lambda_("shortest"))"Balmer")`
`rArrZ^(2)R((1)/(4^(2)))=R((1)/(4))rArrZ^(2)=4 rArrZ=2`


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