Question 1 Page 49 (Top) - Chapter 4 Class 9 - Structure of Atom

On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole.

Answer

• As per Thomson, the model of atom is similar to a plum pudding .
• The pudding is spherical in shape and has dry fruits embedded (spread) throughout the pudding.
• Similarly an atom has negatively charged electrons embedded in a positively charged sphere.
• He explained that the total positive charge is equal to the total negative charge contributed by the electrons embedded.
• Hence, the atom is neutral as a whole.