Q1. What was the underlying principle for the formulation of periodic table?
Q2. What are the various properties showing the recurring trends in a periodic table?
Q3. What is the trend for atomic radii variation in a period across left to right?
Q4. What is the explanation for this trend of atomic radii variation in a period moving cross left to right?
Q5. What are 4f elements range in periodic table?
Q6. What is the anomaly in atomic radii trend of 4f sub shell elements?
Q7. What is Lanthanide contraction and reason for its occurrence?
Q8. What are the elements showing lanthanide contraction and upto which element it is observed?
Q9. Which other effect is noticed after lanthanide contraction upto platinum element?
Q10. What is inert pair effect?
Q11. Give an example of inert pair effect.
Q12. Who gave this inert pair effect?