Question

State the modern periodic law.
Write the features of the modern periodic table.
What are the demerits of Mendeleev's periodic table
What are the uses of the periodic table?
Define reactant and product. Clear your answer with
Define radical? What are electropositive radicals? W
The molecular formula of water is H, O. What does itexpress​

Answer 1

I WAS ONLY ABLE TO ANSWER 1,2,4 QUES........PS- I CAN GIVE FULL NOTES OF PERIODIC TABLE FOR CLASS 9