CLASS - XI CHEMISTRY (Structure of Atom) work sheet-1

Topic:-Discovery of Sub – Atomic Particles

1. Name the sub – atomic particles of an atom.

2. Name the scientist who first formulated the atomic structure.

3. What is the e/m ratio of an electron?

4. What is the charge (e) of an electron?

5. What is the mass (m) of an electron?

6. (i) What is the mass of a proton?

(ii) What is the charge of a proton?

7. (i) What is the mass of a neutron?

(ii) What is the charge of a neutron?

8. Which experiment led to the discovery of electrons and how?

9. Give the main properties of canal ray experiment.