I. Choose the letter of the correct answer. Write your answer on a separate sheet of paper. 1. Who suggested that the electron could jump to a different orbit by absorbing or emitting a
photon of light with exactly the correct energy content?
A. Thomson B. Rutherford C. Bohr D. de Broglie
2. Which model shows that electrons do not orbit the nucleus in circles, instead, it has a
probability that electrons can be found at given points in space around the nucleus?
A. Bohr Model C. Plum-pudding Model
B. Wave Mechanical Model D. Nuclear Model

3. Atom could be pictured as a small positive nucleus with electrons orbiting around it. What
model of the atom is this?
A. Bohr Model C. Plum-pudding Model
B. Wave Mechanical Model D. Nuclear Model

4. What is the mathematical description of the electron’s motion introduced in the wave
mechanical model of the atom?
A. Wave function C. A or B
B. Atomic orbital D. None of the above

5. Schrödinger’s equation required the use of to describe each electron within an atom
corresponding to the orbital size, shape, and orientation in space.
A. Ground State C. Quantum Model
B. Quantum numbers D. Planetary Model