Electronic structure
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What electronic structure means

What electronic structure means

Shell diagram of sodium showing 2 electrons in the first shell, 8 in the second shell, 1 in the third shell, and filling from the inside out

Electronic structure is the arrangement of electrons in shells, also called energy levels, around the nucleus. In a neutral atom, the number of electrons equals the number of protons, so the atomic number tells you how many electrons to place.

Electronic structure Lesson

  1. GCSE
  2. /Chemistry
  3. /Electronic structure