Atomic Structure

The wave mechanical model of the atom maintains that principle energy levels are
1. circular paths in which electrons orbit the nucleus
2. regions of probability where you are likely to find an electron of a certain energy
3. racetrack like paths from which electrons cannot move
4. a figment of our imaginations
Rutherford's Gold Foil Experiment revealed which of the following with regard to the structure of the atom?
1. Electrons exist with in the atom.
2. Protons exist with in the atom.
3. The atom is extremely dense.
4. The atom is mostly empty space.
When electrons gain energy and move into a higher principle energy level, the atom is said to be in the
1. excited state, which is stable.
2. excited state, which is unstable.
3. ground state, which is stable.
4. ground state, which is unstable.
When an electron moves from the first to the third principle energy level it
1. releases energy and moves further from the nucleus
2. releases energy and moves closer to the nucleus
3. absorbs energy and moves further from the nucleus
4. absorbs energy and moves closer to the nucleus
The atomic emission spectrum is created when
1. nuclei undergo fission
2. nuclei undergo fussion
3. electrons move from higher to lower principle energy levels
4. electrons move from lower to higher principle energy levels