CHEM 20A Midterm 1

The Bohr Model Limitations

• Only works for one electron systems.

• Does not take into account the physics between the electrons interacting with each other (no electrodynamics involved).

Bohr Model Guidelines

• Electrons exist in only non-radiating states

• Orbital angular momentum is quantized

• Radiation is emitted or absorbed only during transition between states

Electron radiation

Electrons moving between energy levels will produce waves like light waves or x-ray.

Orbital angular momentum

the l value of primary quantum numbers. tells the shape of orbital that the electron is in (the electron movement around the nucleus), in other words how the electron is circling the nucleus of the atom.

pure substance

form of matter with a constant, uniform composition and distinct chemical properties

chemical compound

pure substance made of two or more different chemical elements combined in a fixed ration