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(2,0)
180, linear
(2,2)
105, bent
(3,1)
107, trigonal pyramid
(4,0)
109.5, tetrahedron
ammonium
NH4+1
Acetate
C2H3O2-1
Cyanide
CN-1
Bicarbonate
HCO3-1
bisulfate
HSO4-1
MnO4-1
permanganate
SCN-1
thiocyanate
chromate
Cr2O4-2
Dichromate
Cr2O7-2
Oxalate
C2O4-2
O2-2
peroxide
Silicate
SiO3-2
Thiosulfate
S2O3-2
when to use polar molecule
when atom looks uneven and has uneven charges on each end
when to use non polar molecule
when atom looks even and has even charges on each end
0-0.3
Pure Nonpolar Covalent bond
0.4-1.8
Polar Covalent bond
Greater than 1.9
Ionic bond