Question
Question: The f-block of the periodic table contains those elements in which :...
The f-block of the periodic table contains those elements in which :
A
Only 4f orbitals are progressively filled in 6th period.
B
Only 5f orbitals are progressively filled in 7th period.
C
4f and 5f orbitals are progressively filled in 6th and 7th periods respectively.
D
None
Answer
4f and 5f orbitals are progressively filled in 6th and 7th periods respectively.
Explanation
Solution
Electronic configuration of f-block element (n – 2) f1–14, (n – 1)d10, ns2 f-block starts with 6th period (n = 6).