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OpenStudy (anonymous):
How would you justify the presence of 18 element in the 5th period of periodic table?
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OpenStudy (anonymous):
Do you mean with electron configuration?
OpenStudy (anonymous):
As a rule, period 5 elements fill their 5s shells first, then their 4d, and 5p shells, in that order, however there are exceptions, such as rhodium. excerpt from wikipedia
OpenStudy (anonymous):
1s22s22p63s23p64s2sd104p65s24d105p6
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