Question

per bohr, energy of each orbit is ______
a always decreasing
b always increasing
c zero
d quantized, and fixed

Explanation:

Bohr's atomic model states that electrons revolve around the nucleus in specific orbits (shells) with fixed, quantized energy levels. The energy of each orbit is not always increasing or decreasing, nor is it zero. Instead, each orbit has a fixed (stationary) energy that is quantized (can only take specific discrete values).

Answer:

D. quantized, and fixed