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Limitations of Mendeleev's Periodic Table

Two elements ...

Question

Two elements were elected by Mendeleev for studying the properties of compounds formed by other elements with the selected elements. What were the selected elements?

A

Oxygen, Nitrogen

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B

Hydrogen, Carbon

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C

Hydrogen, Oxygen

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D

Oxygen, Carbon

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Solution

The correct option is D Hydrogen, Oxygen
The elements selected by Mendeleev were oxygen and hydrogen because most of the elements reacted with oxygen and hydrogen.

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Limitations of Mendeleev's Periodic Table

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