What are groups and periods in the modern periodic table?

Important Questions on Periodic Classification of Elements

HARD

9th Tamil Nadu Board

IMPORTANT

Science Standard 9>Chapter 12 - Periodic Classification of Elements>textbook exercises>Q vi

What are the limitations of Mendeleev's periodic table?

HARD

9th Tamil Nadu Board

IMPORTANT

Science Standard 9>Chapter 12 - Periodic Classification of Elements>textbook exercises>Q vi

State any five features of modern periodic table.