According to the nuclear model of the atom, electrons should continually lose energy and crash into the nucleus.

Which of the following scientist contributed to our understanding of matter with his planetary model?

______ are the fixed, circular orbits in which electrons are found, according to the planetary model of matter.

Mass is emitted or absorbed by electrons whenever electrons move from one energy level to another energy level.

________ is the energy that is required for an atom to move from one energy level to another.

Match the term with the correct definition

The wavelength of light is directly proportional the its frequency.

The oscillating electrical and magnetic fields that travel through space is called ______.

The range of wavelengths or frequencies where electromagnetic 

Match the properties with the type of light.

The condition of an atom when the electrons have the lowest possible energy and are in the lowest possible energy levels is called the ______________.  

The condition of an atom when the electrons have the more than the lowest possible energy and are in the higher possible energy levels is called the ______________.  

Discrete lines of light emitted by an element is called ______.

An atomic emission spectrum for an element is unique to that element.

Which of the following best describes how electrons move between energy levels in an atom?

What happens when an electron gains energy (in the form of light)?

What happens when an electron loses energy (in the form of light)?

For the following electron transitions, predict if energy is absorbed or emitted.