The dand fblock elements - Result Question 18
####18. Which of the following oxidation states is the most common among the lanthanoids? [2010]
(a) 3
(b) 4
(c) 2
(d) 5
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Solution:
- (a) +3 oxidation state is most common for lanthanoids. But occasionally +2 and +4 states are also obtained due to extra stability of empty, half-filled or filled $f$-subshell.
