Assertion: rutherfordium's electron | /r/HasProperty | 6f 5/2
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Source sentences:
text: Beyond element 121, the superactinide series is expected to begin, when the 8s electrons and the filling 8p 1/2 , 7d 3/2 , 6f 5/2 , and 5g 7/2 subshells determine the chemistry of these elements.