Question

what are the merits of Mendeleev's ​

Answer 1

Answer:

Merits: He classified all the known 63 elements at that time. He left gaps for elements to be discovered later on e.g eka aluminium(Galium), eka silicon(Germanium) He pridicted properties of these unknown elements.

Hope it will be helpful to you...

Answer 2

Answer:

You can see your answer in the photo that is attached here, i hope it will help you!