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By Jack Loren
September 16, 2023
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The classification was considered necessary for the systematic and systematic study of elements.
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Now 118 elements have been discovered.
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Out of these, 92 elements are found in the free state in nature and the remaining elements have been prepared by scientists by artificial methods.
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The following scientists presented their opinion about the progress of the periodic table:
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The scientist named Berzelius first classified the elements into metals and non-metals on the basis of the properties of the elements.
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But this classification did not prove to be very useful, due to the following reasons.
Both graphite and iodine are non-metals, but still have a metallic luster.