Question

why did Mendeleev concentrate on the compounds
formed by elements with oxygen and hydrogen?​

Answer 1

Answer:

➡️Among the chemical properties, he concentrated on the compounds formed by elements with hydrogen and oxygen,

➡️He selected hydrogen and oxygen as they are very reactive and formed compounds with most elements.

➡️He sorted out the elements with similar properties and paired the cards together on a wall.

Explanation:

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