Quantum Numbers

• BCHR's model of the atom

  Electrons orbit around the nucleus of an atom
• Electrons orbit around the nucleus


  Like planets orbit around the sun
• Nucleus

  Electrons are planets
• Quantized energy

  Energy is gained or lost in discrete amounts, not continuously
• When an electron gains energy

  It can move to a higher energy level
• When an electron loses energy

  It can move to a lower energy level
• Wave function

  A mathematical function that describes the behavior of particles, such as electrons, in quantum mechanics
• Quantum mechanics

  Particles are described as both particles and waves
• Quantum mechanics

  • It also describes other properties of particles, such as their energy and momentum
• Bohr's model of the atom

  Helps visualize how electrons move around the nucleus in specific energy levels
• Wave function

  Helps us understand the probability of finding electrons in different positions and states
• Bohr's model of the atom

  Electron orbit around the nucleus of an atom
• Nucleus


  Electrons = planets
• Electron orbit


  Specific paths or orbits called energy levels
• Bohr introduces the idea of quantized energy
• Electrons can only exist in certain energy levels, cannot be in between
• When an electron gains or loses energy


  1. It can move between energy levels

  2. Gains energy, higher

  3. Loses energy, lower
• Wave function


  Mathematical function that describes the behavior of particles, such as electrons, in quantum mechanics
• Wave function


  Gives rise to the emission and absorption of light
• Quantum mechanics


  Particles described as both particles and waves
• Quantum mechanics


  • Describes other properties of particles, such as their energy and momentum
• Bohr's model of the atom

  • Helps visualize how electrons move around the nucleus in specific energy levels
• Wave function


  • Helps understand the probability of finding electrons in different positions and states