Question

2 criteria used by Mendeleev in creating his periodic table

Answer 1

Placed elements according to their increasing atomic masses

He left space for elements yet to be discovered

Answer 2

Hey friend your answer is.......

He use the main two criteria are:
1) he arrange his table at the basis of increasing atomic masses of the elements.
2) he was the first person who also arrange his table at the basis of chemical and physical properties of the elements.


I hope it helps you....