6 Written Questions

1. Atoms of the same element that have different numbers of neutrons in the nucleus.
2. A particle with an electric charge (-e) found inside of atoms but outside the nucleus.
3. An instrument that separates light into a spectrum.
4. The number of protons in the nucleus of an atom. The atomic number determines what element the atom represents.
5. The number of protons plus the number of neutrons in the nucleus.
6. A nucleus is stable if it stays together.

5 Multiple Choice Questions

1. The tiny core at the center of an atom containing most of the atom's mass and all of it's positive charge.
   1. Spectrum
   2. Nucleus
   3. Neutron
   4. Stable
2. The theory that describes matter and energy at very small (atomic) sizes.
   1. Neutron
   2. Quantum Theory
   3. Mass number
   4. Nucleus
3. A particle found in the nucleus with a mass similar to the proton but with mass similar to the proton but with zero electric charge.
   1. Electron
   2. Proton
   3. Spectrum
   4. Neutron
4. A bright colored line in a spectroscope.
   1. Spectral line
   2. Electron
   3. Spectrum
   4. Spectroscope
5. It is impossible to know variables exactly in the quantum world.
   1. Energy level
   2. Uncertainty principle
   3. Spectral line
   4. Spectroscope

5 True/False Questions

1. Radioactive → A nucleus is radioactive if it spontaneously breaks up, emitting particles or energy in the process.

   True        False

2. Spectrum → The characteristic colors of light given off or absorbed by an element.

   True        False

3. Energy level → One of the discrete allowed energies for electrons in an atom.

   True        False

4. Elementary charge → The smallest unit of electric charge that is possible in ordinary matter; represented by the lower case letter 'e'.

   True        False

5. Proton → A particle found in the nucleus with a mass similar to the proton but with mass similar to the proton but with zero electric charge.

   True        False