2nd Block Fall 24 Chapter 4 Test

Visible light, X rays, infrared radiation, and radio waves all have the same

• energy.
• wavelength.
• speed.
• frequency.

For electromagnetic radiation, c (the speed of light) equals

• frequency minus wavelength.
• frequency plus wavelength.
• frequency divided by wavelength.
• frequency times wavelength.

A quantum of electromagnetic energy is called a(n)

• photon.
• electron.
• excited state.
• orbital.

For an electron in an atom to change from the ground state to the excited state,

• energy must be released.
• energy must be absorbed.
• radiation must be emitted.
• the electron must make a transition from higher to lower energy.

If electrons in an atom have the lowest possible energies, the atom is in the

• ground state.
• inert state.
• excited state.
• radiation-emitting state.

Which model of the atom explains the orbitals of electrons as waves?

• the Bohr model
• the quantum model
• Rutherford's model
• Plank's theory

The region outside the nucleus where an electron can most probably be found is the

• electron configuration.
• s sublevel.
• quantum.
• electron cloud.

The main energy levels of an atom are indicated by the

• orbital quantum number.
• angular momentum quantum number.
• principal quantum number.
• spin quantum number.

The angular momentum quantum number indicates the

• orientation of an orbital around the nucleus.
• direction of the spin of the electron in its orbital.
• shape of the orbital.
• main energy level of an orbital.

An electron for which n=4 has more ____ than an electron for which n=2.

• spin
• particle nature
• energy
• wave nature