Electronic configuration of the element with atomic number 56 and mass

1.	Electronic configuration of the element with atomic number 56 and mass number 138 is
Answer» `[Xe]6s^(2)` `[Kr]5s^(2)` `[Xe]6s^(2)6P^(2)` `[Xe]3D^(2)5D^(2)` ANSWER :A

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