Tamil
Nadu Matriculation Board
Class IX : Chemistry |
Chapter
1: Atomic Structure |
Very Short Answer Questions: |
| Q1. Define
mass number. |
| Q2. What is
atomic number? |
| Q3. In
Bohr's model, how are electrons arranged? |
| Q4. This
model is unstable due to the property of electron according to classical physics. Which
model and why? |
| Q5. How are
electrons arranged in Rutherford model. |
| Q6.
According to Rutherford model, why were some particles deflected by gold leaf? |
| Q7. What is
neutron? |
| Q8. Write
about the mass of proton. |
| Q9. Which is
the smallest of positive charge? How is it produced? |
| Q10. Compare
the mass of proton with electron. |
| Q11. What
are the conditions for the mass of positive rays? |
| Q12. What
are positive rays? |
| Q13. What is
e/m ratio? |
| Q14. Define
cathode rays. |
| Q15. What is
the nature of cathode rays? |
| Q16. When do
gases conduct electricity? |
| Q17. Define
an atom. |
| Q18. Write
down the symbol for proton, neutron, and electrons. |
Q19. Give
the number of protons and neutrons and electrons for elements.
(a) 17Cl35 (b) 6C12 |
| Q20. Explain
why the mass of atom is the mass of the nucleus. |
| Q21. On what
basis the charge of the atom is determined? |
| Q22. How is
the number of electrons in a shell determined? |
| Q23. What
are energy shells? |
| Q24. Name
the different energy shells and their electron numbers |
| Q25. Draw
the atomic structure of Hydrogen and Lithium. |
| Q26. How
many electrons can be accommodated in L shell and M shell. |
| Q27. What is
the principle of classical physics. |
| Q28. Why is
an atom neutral? |
| Q29. What
are subatomic particles? Name them. |
| Q30. Name
the charge of sub - atomic particles. |
|
Short Answers
Questions:
|
|
Q1.
Describe the properties of cathode rays.
|
|
Q2.
Draw and explain canal rays.
|
|
Q3.
Describe the properties of positive rays.
|
|
Q4.
Write a note on proton.
|
|
Q5.
Write a note on electron.
|
|
Q6.
Write a note on neutron.
|
|
Q7.
Describe Rutherford's model of an atom?
|
|
Q9.
Describe the conclusion of Rutherfords model.
|
|
Q10.
What were the drawback of Rutherford's model?
|
|
Q11. Who proposed the modified model of Rutherford model.
Explain.
|
|
Q12.
Draw the atomic structure of Neon, Magnesium,
Carbon.
|
|
Q13.
How are electron numbers found in energy levels.
|
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Solution |
