The `f`-block elements of the periodic table contains those element in whichA. Only `4f` orbitals are progressively filled in 6th period.B. only `5f` orbtials are progressively filled in 7th period.C. `4f` and `5f` orbitals are progressively filled in 6th and 7th periods respectively.D. None of these

The `f`-block elements of the periodic table contains those element in

1.	The `f`-block elements of the periodic table contains those element in whichA. Only `4f` orbitals are progressively filled in 6th period.B. only `5f` orbtials are progressively filled in 7th period.C. `4f` and `5f` orbitals are progressively filled in 6th and 7th periods respectively.D. None of these
Answer» Correct Answer - C Electronic configuration of `f`-block element `(n - 2) f^(1-14)`, `(n - 1) d^(10) , ns^(2) f`-block starts with 6th period `(n = 6)`.

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