NEET Physics: Structure of Atom questions with solutions

Q1. Plum pudding' model of an atom was proposed by:

1. C.V.Raman
2. N.Bohr
3. E.Rutherford
4. J.J.Thomson

Answer: J.J.Thomson

J.J. Thomson proposed the plum pudding model, in which negatively charged electrons were embedded in a positively charged sphere. This was an early atomic model before Rutherford’s nuclear model replaced it.

Q2. What is the net charge on an neutral atom?

1. positive
2. negative
3. zero
4. none of these

Answer: zero

A neutral atom has the same number of protons and electrons. Since their charges are equal in magnitude and opposite in sign, the total net charge is zero.