Question

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what did Mendeleev examine regarding elements?

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Answer 1

Answer:

Mendeleev examine regarding elements that the physical and chemical properties of elements are periodic function of their weight.

Some characteristics of Mendeleev's periodic table are :-

• Only 63 elements were present.
• Inert gases were not discovered.
• The table consisted of 8 vertical columns or groups.
• It consisted of 7 horizontal rows or periods.
• Group I to VII were divided into two sub-groups A & B in order to accommodate the elements having different properties.
• Group 8 has three sets of three elements in each.
• And, some long periods were divided into 2 series or events.

Answer 2

Answer:

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