Post-Test

An atom emits a photon of light. What could cause this to happen?

• an atom gains energy as it absorbs an incoming electron.

• an excited atom moves to a higher energy level.

• an electron releases energy as it moves to a lower energy level.

• an atom releases energy by rearranging its electron levels

When energy is added to an atom, which of the following events is most likely to occur?

• some of the atom's electrons move to lower energy levels

• some of the atom's electrons move to higher energy levels

• all of the atom's electrons are emitted as electric energy

• all of the atom's electrons are moved to different energy levels

What does the quantum mechanical model describe electrons as ?

• Particles

• Waves

• Small, hard spheres

• Particles with wave-like properties

What is a wavefunction ?

• A wavefunction is the solution to a differential equation known as a wave equation that describes the structure of an electron.

• A wavefunction is the solution to a differential equation known as a wave equation that describes the structure of an atom.

• A wavefunction is the differential equation used to describe the structure of an atom.

• A wavefunction is the differential equation used to describe the structure of an electron.

What is the wavelength of a photon (nm) emitted during a transition from n = 5 state to n = 2 state in the hydrogen atom ?

• 434 nm

• 450 nm

• 350 nm

• 525 nm