According to Thomson's model of an atom: 1. An atom consists of a positively charged sphere and the electrons are embedded in it. 2. The negative and positive charges are not always equal in magnitude. So, the atom as a whole is not always electrically neutral. Choose the correct code:  

According to Thomson's model of an atom: 1. An atom consists of a positively charged sphere and the electrons are embedded in it. 2. The negative and positive charges are not always equal in magnitude. So, the atom as a whole is not always electrically neutral. Choose the correct code:   Correct Answer Only 1

Explanation:

J.J. Thomson (1856- 1940), a British physicist, was born in Cheetham Hill, a suburb of Manchester, on 18 December 1856.

Thomson's model of an atom

• Thomson proposed the model of an atom to be similar to that of a Christmas pudding.
• The electrons, in a sphere of positive charge, were like currants (dry fruits) in a spherical Christmas pudding.
• One can also think of a watermelon, the positive charge in the atom is spread all over like the red edible part of the watermelon, while the electrons are studded in the positively charged sphere, like the seeds in watermelon.
• Thomson proposed that:
  • An atom consists of a positively charged sphere evenly distributed all over the atom and the electrons are embedded in it.
  • The negative and positive charges are equal in magnitude. So, the atom as a whole is electrically neutral.
• Although Thomson’s model explained that atoms are electrically neutral, the results of experiments carried out by other scientists could not be explained by this model.

Additional Information

• Rutherford Model of atom:-
  • There is a positively charged center in an atom called the nucleus.
  • Nearly all the mass of an atom resides in the nucleus.
  • The electrons revolve around the nucleus in well-defined orbits.
• Rutherford's model of the atom is also called the Nuclear model of the atom.