Question

explain how Mendeleev's contribution laid the foundation of modern periodic table​

Answer 1

Answer:

Mendeleev laid the foundation for the Modern Periodic Table by classifying 63 elements in increasing order of their atomic masses. He arranged them in 8 groups by leaving gaps for undiscovered elements and predicting their properties. He made separate groups for metals and non-metals.

Answer 2

Answer:

Mendeleev laid the foundation for the Modern Periodic Table by classifying 63 elements in increasing order of their atomic masses. He arranged them in 8 groups by leaving gaps for undiscovered elements and predicting their properties. He made separate groups for metals and non-metals.