1
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

In context of the lanthanoides, which of the following statements is not correct?

A
14 elements in the sixth period (atomic number $$=58$$ to 71 ) that are filling $$4 f$$-sublevel.
B
common oxidation state is +3 .
C
Availability of $$4 f$$-electrons results in the formation of compounds in +4 state for all numbers of the series.
D
There is a gradual decrease in the of the elements with increasing atomic numbers in the series.
2
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following lanthanides are used in TV screens?

A
Eu
B
Ce
C
Tb
D
Dy
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