Question
Which of the following statements is correct?
A.
Elements of $$3d$$ and $$4d$$ - series are kept separately in periodic table.
B.
Elements of $$4f$$ and $$5f$$ - series are kept separately in periodic table.
C.
Elements of $$5p$$ and $$6p$$ - series are kept separately in periodic table.
D.
All statements are correct.
Answer :
Elements of $$4f$$ and $$5f$$ - series are kept separately in periodic table.
Solution :
Elements of $$4f$$ - and $$5f$$ - series are kept separately as lanthanoids and actinoids.