Friday 17 July 2015

CLASS - XI CHEMISTRY (Structure of Atom) work sheet-2


Topic:-Atomic Models

1. Name the scientist who first gave the atomic model.

2. What is an isotope?

3. What are isobars?

4. What are isotones?

5. What is an atomic number?

6. What is a mass number?

7. Find out atomic number, mass number, number of electron and
neutron in an element 4 0 2 0 ´ ?

8. Give the main features of Thomson’s Model for an atom.

9. Give the drawbacks of J.J. Thomson’s experiment.

10. What did Rutherford conclude from the observations of a - ray
scattering experiment?

11. Why Rutherford’s model could not explain the stability of an atom?

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