Which of the following statements regarding the modern periodic table is correct?
A. It consists of 18 vertical columns, which are called groups
B. It consists of 7 horizontal rows, which are called groups
C. It consists of 18 horizontal rows, which are called period
D. It consists of 7 vertical column, called period
Answer: Option A
This Question Belongs to Chemistry GK Chapter Wise >> 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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