Question

(b) Mendeleev's contributions to the concept of periodic table laid the foundation for the Modern Periodic Table. Give reasons.
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Answer 1

Answer:

Mendeleev laid the foundation for the modern periodic table by showing periodicity of the properties of the elements by arranging the elements (63) then known into 8 groups, by leaving gaps for undiscovered elements and predicting their properties. He made separate groups for metals and non-metals.

Explanation:

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Answer 2

Answer:

Mendeleev laid the foundation for the modern periodic table by showing periodicity of the properties of the elements by arranging the elements (63) then known into 8 groups, by leaving gaps for undiscovered elements and predicting their properties. He made separate groups for metals and non-metals.

Explanation:

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