GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How are the following elements arranged in the Periodic table?
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H, He, Be, Li and B
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H, He, Li, Be and B
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H, Be, He, B and Li
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H, He, Li, Be and B
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Explanation:
Detailed explanation-1: -The correct answer is H, He, Li, Be, and B. It is a tabular display where all the elements are organized according to their chemical properties. The periodic table modern has 18 groups and 7 periods. Dimitri Mendeleev started the configuration of atoms according to their atomic number.
Detailed explanation-2: -British chemist John Newlands was the first to arrange the elements into a periodic table with increasing order of atomic masses. He found that every eight elements had similar properties and called this the law of octaves. He arranged the elements in eight groups but left no gaps for undiscovered elements.
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