Multiple choice

For similarities in chemical properties, why did Mendeleev concentrated on the oxides and hydrides of the elements?

  1. Oxygen and hydrogen were his favourite elements .

  2. Oxygen and hydrogen are gases.

  3. Oxygen and hydrogen were highly reactive in nature and formed compounds with almost every element.

  4. Oxygen and hydrogen were old elements.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

oxygen and hydrogen are very reactive in nature and formed compounds with almost every element

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