Lewis Structures & VSEPR - Vocabulary Flashcards

Vocabulary flashcards covering VSEPR theory concepts, electron regions, and ideal/nonideal bond angles corresponding to common geometries.

Linear

Molecule with two electron regions around the central atom; bond angle is 180°.

Trigonal Planar

Molecule with three electron regions; ideal bond angle is 120°.

Tetrahedral

Molecule with four electron regions; ideal bond angle is 109.5°.

Trigonal Bipyramidal

Molecule with five electron regions; ideal angles are 90° (axial–equatorial) and 120° (equatorial–equatorial).

Octahedral

Molecule with six electron regions; ideal bond angle is 90°.

No Lone Pairs on Central Atom

Central atom has zero lone pairs; leads to ideal angles according to the electron-region geometry.

Lone Pairs

Pairs of valence electrons on the central atom that are not shared with another atom; they influence bond angles and geometry.