Question

Q.(a). The modern periodic table has been evolved through the early attempts of Dobereiner, Newland and Mendeleev. List one advantage and one limitation of all the three attempts.
Q.(b). Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
Q.(c). State Modern periodic law.

Answer 1

Q. c. Answer I hope it will help you