(a) Draw the sketch of Bohr ’s model of an atom.

(b) Draw the sketch of Thomson’s model of an atom.

What are isotopes? Where do they find applications?

Define the following:

(a) Atomic number

(b) Atomic mass

(c) Isobars.

Draw the sketch of Rutherford’s α- particle scattering experiment.

Draw the atomic structure of the following elements:

Sodium atom and Sodium Ion