Dot-and-Cross Diagrams

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Created by
Miles Poulton

Cards (3)

  • Dot-and-cross diagrams can show electrons being transferred and ions being formed. Dots represent electrons from 1 atom and crosses represent electrons from the other atom. Square brackets and a charge (e.g. 2+) represent ions.
  • Sodium + Fluorine
    • The sodium atom transfers its outer electron to the fluorine atom, creating Na+ and F- ions. Both of these ions have full outer shells.
  • Calcium + Oxygen
    • The calcium atom transfers its 2 outer electrons to the oxygen atom, creating Ca2+ and O2- ions which both have full outer shells.