What is the specialty of rare earth elements?
A. Their outermost shells are complete
B. Their three outermost shells are incom
C. Their two outermost shales are incomplete
D. Their one outermost shell is incomplete
Answer: Option B
This Question Belongs to Chemistry GK Chapter Wise >> Periodic Classification Of Elements
Related Questions on Periodic Classification of elements
The law of Octaves' was proposed by:
A. Johann Dobereiner
B. Alexander Newlands
C. Lothar Meyer
D. Dmitri Mendeleev
A. Periodic trends in physical properties of elements
B. Periodic trends in chemical properties of elements
C. Both A and B
D. None of the above
Which of the following resembles the 10th element in Newland's periodic classification?
A. third
B. ninth
C. fourth
D. first
A. law of Triads
B. law of Dobereiner
C. law of Octaves
D. law of Duet
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