Questions
Electronic configuration of the element with atomic number 56 and mass number 138 is
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a
[Xe]6s2
b
[Kr]5s2
c
[Xe]6s2 6p2
d
[Xe]3d2 5d2
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Correct option is A
Electronic configuration of the element with atomic number 56 and mass number 138 is: 1s22s22p63s23p64s23d104p65s24d105p66s2
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