The Periodic Table of Elements

Chemistry Board Question
Chapter Seven

The Periodic Table of Elements
Short Question
1. What is periodic table? What is its basis? (DB-98, SB-01, CtgB-00) 2
2. i) What is the aim of modern periodic table? (CB-01, JB-05) 2
 ii) What is meant by period and group? (JB-05) 1
3. i) What are the transition elements? (SB-04) 1
 ii) In which periods there contain how many transition elements? Find out their positions in the periodic table. (CtgB-02) 2
4. "The size of the atoms is also a periodic properties"- Explain. (DB-98) 2
5. "The Atomic mass of the element can not be the basis of periodic table"-Explain. (SB-05) 2
6. The atomic number of sulphur is 16. Find out its position in the periodic table. (DB-02) 2
7. Show the electronic configurations and find out the position of the following elements in the periodic table. Mg (CB-02), S(CB-02), Al(CtgB-03)
8. State with example, how the valency of the elements changes in the same period of the periodic table. (RB-04) 2
9. State the number of elements in each period of the period table. (CtgB-04) 2
  Or,
 Discuss period contains how many elements in the periodic table. (CtgB-04) 2
10. Describe how the size of atoms changes in any group and period. (CtgB-03) 2
11. i) What do you mean by periodic properties of the elements? ii) Write the names of the periodic properties. (RB-03, CtgB-03, BB-03) 2
12. What is quantum? (CB-01) 1
13. The real basis of the periodic table is the electronic configuration- Prove it with the help of examples. (CB-04, DB-05) 2
14. i) 'The size of the elements decreases from left to right in the same period Explain. (CB-02)pre08 2
 ii) As it is proceeded from left to right in the same period the size of the elements decreases Explain the reason. (CB-02) 2
 iii) "The physical property of elements in any group changes slowly and regularly" Justify this truth with the elements of group-IA and group VIIA (CtgB-02) 2

Broad Question
15. What are the basis of the periodic table? Explain at you own. (CtgB-00, RB-02) 3
  Or,
 Give the logical proof at your answer.
16. Size of the atoms is a periodic property- Explain why? (CtgB-00, BB-00, RB-03) 3
17. i) Write down the properties / characteristics of a modern periodic table. (SB-04, CtgB-99) 3
 ii) Write the four properties of the periodic table. (BB-03) 2
18. (i) What is the real basis of the periodic table? (ii) Find out the position of the element having atomic number 86. (DB-99) 3
19. Find out the position of the elements in the periodic table with their respective electronic configuration having atomic number ________. Write the name of the elements.
 (i) 13 (JB-03, 01) (ii) 17 (JB-03) (iii) 37 (JB-03) (iv) 19 (DB-01) (v) 26 (JB-02) (vi) 11 (JB-01, 99) (vii) 20 (JB-01) (viii) 29 (JB-01pre08 )(ix) 18 (JB-99)
20. i) The metallic property of the elements changes periodically from left to right in periodExplain. (RB-98)Test 08 4
 ii) Explain from the properties of elements of third period of periodic table that, the more one moves from left to right, the metallic property of the elements decreases. (RB-05, CtgB-05) 3
21. The properties of the elements changes periodically in the periods of the periodic tableExplain. (RB-99, CtgB-98, SB-01) 4
22. What you can come to know from the modern periodic table. (CB-01) 4
23. Write down the Mendeleev periodic law and show its drawback with at least two examples. 
24. "The real basis of the periodic table is electronic configuration of the elements"Explain with the examples. (DB-00, RB-00, JB-99, BB-04)Pre-08 3
25. Explain with examples how the size of the elements changes in the same period. (CtgB-03) 3