Question

The properties of elements are a periodic function of their atomic weights. 

1. Who proposed this law?

2. Can you see anything wrong in this law? If yes, justify your answer. 

3. State modern periodic law.

Answer 1

1. Mendeleev 

2. Yes, atomic number is the more fundamental property of an element than atomic mass. 

3. The physical and chemical properties of the elements are periodic functions of their atomic numbers.