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SSC CGL 2019 PYQ — Question 38

SSC CGL - 10th June 2019 - Shift 1 • General Awareness • Q38

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Law of octaves says that if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of ______ elements.

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Correct answer: D

Explanation

The correct answer is option 4, i.e. 7.   

The Law of octaves says that if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of ______ elements. 

7 

What is Law of octaves?   
  • The law of octaves states that every eighth element has similar properties when the elements are arranged in the increasing order of their atomic masses.
  • Newland’s law of octaves held true only for elements up to calcium. Elements with greater atomic masses could not be accommodated into octaves.