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Electron Geometry (Simplified) definitions

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  • Electron Geometry
    Simplest system for shapes based on the total number of electron groups around a central element, treating lone pairs and surrounding elements equally.
  • Electron Group
    Any region of electron density around a central element, including both lone pairs and bonds to surrounding elements.
  • Central Element
    Atom in a molecule around which electron groups are counted to determine overall geometry.
  • Lone Pair
    Non-bonding electrons on the central element, counted as one group when determining geometry.
  • Surrounding Element
    Atom bonded to the central element, each bond counted as one group for geometry purposes.
  • Linear
    Arrangement where two electron groups form a straight line, resulting in a 180° angle.
  • Trigonal Planar
    Shape formed by three electron groups arranged in a flat, triangular plane around the central element.
  • Tetrahedral
    Three-dimensional arrangement where four electron groups are spaced as far apart as possible around a central element.
  • Tri Prefix
    Indicates the number three, used to describe geometries with three electron groups.
  • Tetra Prefix
    Indicates the number four, used to describe geometries with four electron groups.
  • Geometrical Shape
    Spatial arrangement of electron groups around a central element, influencing molecular structure.
  • Bond Angle
    Angle formed between adjacent electron groups around a central element, characteristic of each geometry.