Provides a complete summary of all formulas in the entire a level chemistry course, as well as all shapes of molecules with bond angles and examples. Also outlines all 6 trends in Periodicity for Group 2, Group 7 and Period 3
Name Electron Bond Lone Shape Common
domains pairs Pairs examples
Linear 2 2 0 CO2
MgCl2
Trigonal 3 3 0 BF3
planar NO3–
CO32–
Bent 3 2 1 NO2–
(V-shaped) SO2
O3
Tetrahedral 4 4 0 CH4
MnO4–
SO42–
PO43–
NH4+
Trigonal 4 3 1 NH3
Pyramidal ClO3–
SO32–
Angular/ 4 2 2 H2O
Bent ClO2
NH2–
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