What 3 properties did Mendeleev write on his cards to organize 63 elements?

He wrote each element's melting point, density, atomic mass, and color on cards. The atomic mass of an element is the average mass of all the isotopes of that element. He tried arranging them in different ways.

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.

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