Chemistry Test Chapter 10

Electron Geometry

Electron Geometry

arrangmenet of elctron regions around an atom

Molecular Geometry

arrangment of the atoms around a central atom

Linear geometry

2 electron regions

2 bonding regions, 0 lone pairs

180 bond angle

Trigonal planar

3 electron regions

3 bonding regions, 0 lone pairs

120 bond angle

Trigonal bent

3 electron regions

2 bonding regions, 1 lone pair

Less that 120 degrees bond angle

Tetrahedral

4 elctron regions

4 bonding regions, 0 lone pairs

109.5 bond angle

Trigonal pyramidal

4 electron regions

3 bonding regions, 1 lone pair

Less than 109.5 bond angle

Tetrahedral bent

4 electron regions

2 bonding regions, 2 lone pairs

Less than 109.5 bond angle

Electronegativity

an atom’s ability to attract electrons in a covalent bond, this attration causes a distortion in the electron cloud

Dipole moment

results from an uneven distribution of electrons

VSEPR

valence shell electron pair repulsion