Learning Modules 7-12

Light propagates in

• electric fields

• magnetic fields

• both electric and magnetic fields

• neither magnetic nor electric fields

What is the frequency of light with a wavelength of 3 meters?

• 3 x 10^8 Hz

• 1 x 10^8 Hz

• 3 x 10^15 Hz

• 1 x 10^15 Hz

Compared to a 620 nm photon, a 760 nm photon has

• longer wavelength, higher frequency, and higher energy

• shorter wavelength, higher frequency, and lower energy

• shorter wavelength, lower frequency and lower energy

• longer wavelength, lower frequency, and lower energy

The work function of a silver surface is 4.73 eV. Two photons of 2.5 eV each hit the silver. What happens?

• One electron is released from the silver surface, with kinetic energy of about 0.47 eV.

• Two electrons are released from the silver surface.

• A pit forms in the silver due to the impact.

• Nothing. The photons just bounce off the surface.

Which of the following experiments most directly supports de Broglie's hypothesis of the wave nature of matter?

• Electron diffraction by a crystal

• The emission spectrum from the hydrogen atom

• The photoelectric effect

• Blackbody radiation

Light behaves like _______.

• both a particle and a wave.

• a wave.

• a particle.

• neither a particle or a wave.

What is the full electronic configuration for neutral chlorine?

• 1s²2s²2p⁶3s²3p⁵

• 1s²2s²2p⁶3s⁷

• 1s²2s²2p⁶3s²3p⁶

• 1s²2s²2p⁶3s²3d¹⁰3p⁵

When the n quantum number equals 1, we are in what orbital?

• s

• p

• d

• f

What is the frequency of light released when an electron moves from the 2nd energy level to the 1st energy level in hydrogen?

• 3.3 x 10¹⁴ Hz

• 2.5 x 10¹² Hz

• 2.5 x 10¹⁵ Hz

• 3.3 x 10¹⁸ Hz