1.

""_(86)^(223) Ra is a member of actinium series . Which of the following nuclide belong to the same series ?

Answer»

`""_(91)^(235) PA`
`""_(90)^(232) Th`
`""_(92)^(238) U`
`""_(88)^(237) Ra`

Solution :`(4 n + 3)` SERIES `implies Pa""_(91)^(235) , Ra""_(88)^(227)`


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