1. If the Electronic configurations of atoms X and Y respectively 1s² 2s² 2p⁶ 3s¹ and 1s² 2s² 2p⁴, then
i) Which atom forms anion?
ii) Which atom forms cation?
iii) To which block does the elements X, Y belongs
iv) Write the formula of the compound formed the atoms of X and Y.   (AS 1) 4 Marks
 

2. How can you explain the overcome the limitations of Mendeleev's table with the help of Modern Periodic table?   (AS 1) 4 Marks
 

3. Write the differences between Mendeleev's periodic table and modern periodic table.   (AS 1) 4 Marks
 

4. Outline of periodic table is given below. In the table the letters A to K do not represent their symbols. Using only these letters answer the questions.    (AS 4) 4 Marks

Which of the element is
i) a halogen
ii) a chalcogen
iii) a noble gas
iv) an alkali metal
v) an alkaline earth metal
vi) a transition elements
vii) an inner transition elements
viii) a Lanthanoid
 

5. Using the periodic table complete the table given below and answer the questions.  (AS 4) 4 Marks

i) Which is the first element of 4th period?
ii) How many elements are there in 6th period?
iii) Which is the basic metal in 7th period?
iv) Name the noble gas element of 5th period?
 

6. An element X belongs to 3rd period and 13th group of periodic table, then state.   (AS 1) (AS 4) 4 Marks
i) Name the element and write its electronic configuration.
ii) Number of valence electrons in the element.
iii) The valency of the element.
iv) Whether it is metal or non - metal?
 

7. "Efforts" of Mendeleev in regard with classification of elements are outstanding". Do you agree or disagree with the above statement. Explain with proper reasons.   (AS 1) 4 Marks
 

8. Explain the efforts made by scientists in making of the period table.  (AS 1) 4 Marks

9. Fill the following table with suitable answers.   (AS 1) (AS 4 ) 2 Marks

10. Fill the following table with suitable answers.   (AS 4) 2 Marks

11. Explain the construction of periods in the modern periodic table.  (AS 1) 2 Marks

12. Explain the construction of groups in the modern periodic table.  (AS 1) 2 Marks
 

13. Orbitals of same main shell have different penetration power towards the nucleus. Explain with one example.   (AS 1) 2 Marks
 

14. Nitrogen's Ionisation energy is more than that of Oxygen. Give reason.   (AS 1) 2 Marks
 

15. What are the limitations of Mendeleev's periodic table.   (AS 1) 2 Marks
 

16. How the metallic and non - metallic nature of elements vary in a group and a period. (AS 1) 2 Marks
 

17. Name the Inert gas elements. Why the elements got that name?   (AS 1) 2 Marks
 

18. Explain the screening (shielding) effect. How does it influence Ionisation energy? (AS 1) 2 Marks
 

19. If the electronic configuration of an element 'A' is 2, 8, 6 then
i) Is it small or big in atomic size then element 'b' (Z = 14)? Why?
ii) Among O(8), C(6), N(7), Ar(18) which element does and element 'A' has chemical similarities? Why?   (AS 1) 2 Marks

20. Find out the atoms which can form anions with the help of electronic configurations given below. Give reason for this  (AS 1) 2 Marks
X - 1s² 2s² 2p⁶ 3s²3p⁶
Y - 1s² 2s² 2p⁶ 3s² 3p⁵
 

21. If the atomic numbers of three elements X, Y, Z are 2, 6, 10 respectively, then  (AS 1) 2 Marks
i) Name the two elements of same group.
ii) Which are two elements of same period. Give reason.
 

22. Elements were classified in various ways by various scientists. Explain the classification of any two scientists.  (AS 1) 2 Marks
 

23. Li, Na, K are Dobereiner's triad. The atomic weight of Li is 7 and that K is 39, then find the atomic weight of Na.  (AS 1) 1 Mark
 

24. How does Milliken has decided the values for Electronegativity?   (AS 1) 1 Mark
 

25. How did Linus Pauling assign the values for electronegativity? What is the basis for this.   (AS 1) 1 Mark