Bohr model

Isotopes: atoms of the same element with different number of neutrons. On the notation here (I don’t know what this is called): ${}_b^{a}E$, $a$ is the total mass number, and $b$ is the proton number.

The 3 spectrums:

• Continuous
  • Non-discrete spectrum of all frequencies of light.
• Emission
  • Light emitted when electron drops an energy level
• Absorption
  • Continuous spectrum with discrete black lines to indicate frequencies of waves absorbed by electron.

Electron Configurations