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Q1. How the elements are arranged in a periodic table?

Q2. How new periods and groups are formed in a periodic table?

Q3. What is a group in a periodic table?

Q4. What is the common shared property in a group?

Q5. How many groups are present in a periodic table?

Q6. Which are the four lighter elements?

Q7. Mendeleev predicted four elements in his earlier periodic table,name them.

Q8. Mendeleev originally named the elements from which country?

Q9. H, He and Hf are symbols of which elements?

Q10. Name the elements with symbols Hg, Ho and Hs.

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