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Which orbital is filled immediately before the 4f subshell?
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a
6s
b
5p
c
5d
d
4d
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Correct option is C
One e−goes to 5d sub-shell before the 4f sub-shell The electronic configuration of La(Z=57)⇒[Xe]546s25d14f0Ce(Z=58)⇒[Xe]546s25d14f1Talk to our academic expert!
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The atomic number of an element having the valency shell electronic configuration is
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