Energy and Light Review

Front

What happens when an electron drops from a higher to a lower energy level?

Back

The atom emits light, resulting in the release of energy in the form of photons.

Front

What is an absorption line in a spectrum?

Back

An absorption line is a dark line in a spectrum caused by the absorption of specific wavelengths of light by atoms or molecules.

Front

How can you identify an unknown gas using its emission spectrum?

Back

By comparing the emission spectrum of the unknown gas to the known spectra of pure elements, you can identify the gas based on matching spectral lines.

Front

What causes the emission of radiant energy that produces characteristic spectral lines?

Back

The emission of radiant energy occurs when electrons return to lower energy levels, releasing energy in the form of light.

Front

What is the difference between emission and absorption spectra?

Back

Emission spectra show the wavelengths of light emitted by an atom, while absorption spectra show the wavelengths absorbed by an atom.

Front

What is the role of energy levels in an atom?

Back

Energy levels determine the possible energies that electrons can have in an atom, influencing the atom's ability to absorb or emit light.

Front

What is a photon?

Back

A photon is a particle of light that carries energy and is emitted or absorbed when electrons transition between energy levels.

Front

What is the significance of spectral lines in identifying elements?

Back

Spectral lines are unique to each element, allowing scientists to identify the presence of specific elements in a sample.

Front

What is the process of electron excitation?

Back

Electron excitation occurs when an electron absorbs energy and moves to a higher energy level.

Front

What is the relationship between wavelength and energy of light?

Back

The energy of light is inversely proportional to its wavelength; shorter wavelengths have higher energy.