Question

28. The elements in the Mendeleef's periodic table were arranged on the basis of reaction with two elements.
Hydrogen and oxygen
b) carbon and oxygen
c) Hydrogen and carbon
d) none of the above​

Answer 1

Answer:

a)Hydrogen and Oxygen

Explanation:

Because they react with almost all the elements and Hence,the elements'properties can be defined on basis of chemical reaction with Hydrogen and Oxygen