Question

Mendeleevs contributions to the concept of periodic table laid the foundation for the modern periodic tabl
e give reasons

Answer 1

Mendeleev has discovered his own periodic table which is arranged in increasing atomic mass. Also he predicted the space for the elements which are not discovered at that time and told the properties of these elements.And hence hi was called as the father of periodic table.
In the concept of him only the long form of periodic table is formed......
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Answer 2

Mendeleev unveiled his periodic table, quickly gaining recognition for his way of arranging elements according to likeness in weight and chemical reactivity.