Electrons

• Electrons

  About 2000 times smaller than protons or neutrons, negative charge of 1 minus
• Electrons


  Surround the nucleus and have a negative charge
• Electrons in an atom

  1. Arranged in a series of energy levels (shells)

  2. Can jump up to a higher energy level if they gain enough energy (become excited)

  3. Will fall back down to the lower energy level and re-emit the energy as electromagnetic radiation
• Electrons are arranged in shells around the nucleus, with the shells getting further away from the nucleus at higher energy levels
• Shell structure

  2,8,8…