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A hydrogen like specie is in a spherical symmetrical orbitalS_(1) having 3 radial node. It gets dexcited to another level S_(2) having no radial node. Energy of S_(2) orbital is 2.25 times energy of 1st bohr orbit of hydrogen atom. Based on this information answer the questions that follow. Identify the specie involved

Answer»

`He^(+)`
`Be^(+3)`
`Li^(+2)`
`B^(+4)`

Solution :`S_(2)=2.25 (S_(1))_(H)`
`13.6xx(Z^(2))/(n^(2)) =9/4 XX 13.6`
`Z=3 rArr Li^(2+)`


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