1.

Atomic number 64 will have electronic configuration

Answer»

`[Xe]_(54), 5s^(2) 4f^(8)`
`[Xe]_(54), 6S ^(2), 4f^(2), 5D^(1)`
`[Xe]_(54), 4t^(10)`
`[Xe]_(54), 6s^(2), 4f^(7), 5p^(1)`

Answer :B


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