A major drawback of Rutherford's model of an atom is that it does not explain the stability of the atom. He suggested that electrons are revolving around the nucleus in circular revolutions. However the circular motion is said to be accelerated. If we apply this electromagnetic theory to Rutherford's model it means that the electrons revolving around the nucleus will radiate energy continuously at every turn and move closer and closer to the nucleus. To overcome this drawback of Rutherford's model, Neils Bohr proposed a new model which suggest that electron could revolve around the nucleus in certain fixed circular paths called energy level which have fixed or quantized energy. As long as an electron remains in a particular orbit, it does lose or gain energy.
According to Bohr's postulates the orbits are also known as energy levels because

Options

A. each orbit has fixed energy
B. all orbits have fixed energy
C. electrons do not radiate energy
D. orbits move in a circular path.

Answer

A

Explanation

Each orbit has fixed energy hence it is known as energy level.