Compare all the proposed models of an atom given in this chapter.​

Comparison of proposed models of an atom(Thomson’s model, Rutherford’s model and Bohr’s model) can be given as,​

​

Thomson’s model​	Rutherford’s model​	Bohr model​
In an atom, the negatively charged electrons are embedded in a positively charged sphere​	The nucleus is at the center and is positively charged holding the entire mass.​	An atom holds the nucleus at the centre. ​ Negatively charged particles called electrons revolve around the nucleus in fixed paths - Orbit​
The net charge in the atom is zero.​	Electrons are negatively charged revolving in a well-defined path​	An orbit has fixed energy - Energy level​
​	In comparison with the nucleus, the size of the atom is very large.​	When electron absorbs energy, it moves from lower energy state to higher energy state.​ Electrons moves from higher energy state to lower energy state and releases energy.​