Emission Spectra and Nuclear Reactions Quiz

What causes the lines seen in an emission spectrum?

• Electrons gaining energy

• Electrons jumping to lower energy levels

• Nuclei absorbing photons

• Alpha particle emission

Each element has a unique emission spectrum because:

• All atoms emit the same photons

• Atoms have the same nucleus

• Energy levels are unique for each element

• Electrons are the same mass

Which of the following is released when an electron moves to a lower energy level?

• Neutron

• Proton

• Photon

• Electron

The color of light in the emission spectrum corresponds to:

• The nucleus type

• Electron spin

• Wavelength of emitted photon

• Type of atom

What does a line spectrum tell us about the atom?

• The temperature of the atom

• The arrangement of protons

• The allowed energy levels

• The speed of light

Emission lines are produced when:

• Electrons are absorbed

• Photons hit the nucleus

• Electrons lose energy

• Protons decay

A hydrogen atom emits red light when:

• Its nucleus splits

• An electron is ejected

• An electron falls from n=3 to n=2

• A neutron is released

Which of these emissions corresponds to the highest energy?

• Red light

• Green light

• Blue light

• Ultraviolet

What can emission spectra be used for in astronomy?

• Measure pressure

• Identify elements in stars

• Estimate Earth's age

• Measure gravity

The frequency of light emitted increases if:

• The energy change is smaller

• The electron is absorbed

• The energy difference is greater

• The nucleus is larger