MM3 ATOM TYPE LIST
| ATOM TYPE | SYM | DESCRIPTION | AT WT |
| 1 | C | CSP3 | 12.000 |
| 2 | C | CSP2 ALKENE | 12.000 |
| 3 | C | CSP2 CARBONYL | 12.000 |
| 4 | C | CSP ALKYNE | 12.000 |
| 5 | H | EXCEPT ON N,O,S | 1.008 |
| 6 | O | C-O-H, C-O-C, O-O | 15.995 |
| 7 | O | =O CARBONYL | 15.995 |
| 8 | N | NSP3 | 14.003 |
| 9 | N | NSP2 | 14.003 |
| 10 | N | NSP | 14.003 |
| 11 | F | FLUORIDE | 18.998 |
| 12 | Cl | CHLORIDE | 34.969 |
| 13 | Br | BROMIDE | 78.918 |
| 14 | I | IODIDE | 126.900 |
| 15 | S | -S- (SULFIDE) | 31.972 |
| 16 | S+ | >S+ (S-FONIUM) | 31.972 |
| 17 | S | >S=O (S-OXIDE) | 31.972 |
| 18 | S | >SO2 (SULFONE) | 31.972 |
| 19 | Si | SILANE | 27.977 |
| 20 | * | not used | 999.000 |
| 21 | H | -OH ALCOHOL | 1.008 |
| 22 | C | CYCLOPROPANE | 12.000 |
| 23 | H | NH AMINE/IMINE | 1.008 |
| 24 | H | COOH CARBOXYL | 1.008 |
| 25 | P | >P- PHOSPHINE | 30.994 |
| 26 | B | TRIGONAL B | 11.009 |
| 27 | B | TETRAHEDRAL B | 11.009 |
| 28 | H | H-N-C=O (AMIDE) | 1.008 |
| 29 | C* | RADICAL | 12.000 |
| 30 | C+ | CARBONIUM ION | 12.000 |
| 31 | Ge | GERMANIUM | 73.922 |
| 32 | Sn | TIN | 117.902 |
| 33 | Pb | LEAD (IV) | 207.977 |
| 34 | Se | SELENIUM | 79.917 |
| 35 | Te | TELLURIUM | 129.907 |
| 36 | D | DEUTERIUM | 2.014 |
| 37 | N | -N=C-/PYR (DELOCLZD) | 14.003 |
| 38 | C | CSP2 CYCPROPENE | 12.000 |
| 39 | N+ | NSP3 (AMMONIUM) | 14.003 |
| 40 | N | NSP2 (PYRROLE) | 14.003 |
| 41 | O | OSP2 (FURAN) | 15.995 |
| 42 | S | SSP2 (THIOPHENE) | 31.972 |
| 43 | N | =N-O, AZOXY (LOCAL) | 14.003 |
| 44 | H | S-H (THIOL) | 1.008 |
| 45 | N | AZIDE (CENTER N) | 14.003 |
| 46 | N | NITRO | 14.003 |
| 47 | O | CARBOXYLATE ION | 15.995 |
| 48 | H | AMMONIUM | 1.008 |
| 49 | O | EPOXY | 15.995 |
| 50 | C | BENZENE (LOCALIZED) | 12.000 |
| 51 | He | HELIUM | 4.003 |
| 52 | Ne | NEON | 20.179 |
| 53 | Ar | ARGON | 39.948 |
| 54 | Kr | KRYPTON | 83.800 |
| 55 | Xe | XENON | 131.300 |
| 56 | C | CSP3 (CYCLOBUTANE) | 12.000 |
| 57 | C | CSP2 (CYCLOBUTENE) | 12.000 |
| 58 | C | C=O (CYCLOBUTANONE) | 12.000 |
| 59 | Mg | MAGNESIUM | 24.301 |
| 60 | P | P (V) | 30.994 |
| 61 | Fe | IRON (II) | 55.847 |
| 62 | Fe | IRON (III) | 55.847 |
| 63 | Ni | NICKEL (II) | 58.710 |
| 64 | Ni | NICKEL (III) | 58.710 |
| 65 | Co | COBALT (II) | 58.933 |
| 66 | Co | COBALT (III) | 58.933 |
| 67 | C | C=O (CYCLOPROPANONE) | 12.000 |
| 68 | C | CUMULENE Csp =C= | 12.000 |
| 69 | O | AMINE OXIDE OXYGEN | 15.995 |
| 70 | O | KETONIUM OXYGEN | 15.995 |
| 71 | C | KETONIUM CARBON | 12.000 |
| 72 | N | =N-,IMINE (LOCALZD) | 14.003 |
| 73 | H | H-O ENOL (PHENOL) | 1.008 |
| 74 | S | S=C | 31.972 |
| 75 | O | O-H, O-C (CARBOXYL) | 15.995 |
| 76 | O | O=C-C=O | 15.995 |
| 77 | O | O=C-O-H (ACID) | 15.995 |
| 78 | O | O=C-O-C (ESTER) | 15.995 |
| 79 | O | O=C-N< (AMIDE) | 15.995 |
| 80 | O | O=C-X (HALIDE) | 15.995 |
| 81 | O | O=C-C=C< | 15.995 |
| 82 | O | O=C-O-C=O | 15.995 |
| 83 | O | O=C(OH)(OH) | 15.995 |
| 84 | O | O=C(OH)(OC) | 15.995 |
| 85 | O | O=C(OH)(N<) | 15.995 |
| 86 | O | O=C(OH)(X) | 15.995 |
| 87 | O | O=C(OH)(C=C<) | 15.995 |
| 88 | O | O=C(OH)(O-C=O) | 15.995 |
| 89 | O | O=C(O-C)(O-C) | 15.995 |
| 90 | O | O=C(O-C)(N<) | 15.995 |
| 91 | O | O=C(O-C)(X) | 15.995 |
| 92 | O | O=C(O-C)(C=C<) | 15.995 |
| 93 | O | O=C(O-C)(O-C=O) | 15.995 |
| 94 | O | O=C(N<)(N<) | 15.995 |
| 95 | O | O=C(N<)(X) | 15.995 |
| 96 | O | O=C(N<)(C=C<) | 15.995 |
| 97 | O | O=C(N<)(O-C=O) | 15.995 |
| 98 | O | O=C(X)(X) | 15.995 |
| 99 | O | O=C(X)(C=C<) | 15.995 |
| 100 | O | O=C(X)(O-C=O) | 15.995 |
| 101 | O | O=C(C=C)(C=C) | 15.995 |
| 102 | O | O=C(C=C)(O-C=O) | 15.995 |
| 103 | O | O=C(O-C=O)(O-C=O) | 15.995 |
| 104 | S | -S-S- DISULFIDE | 31.972 |
| 105 | S | -S- POLYSULFIDE | 31.972 |
| 106 | C | C=O (KETENE) | 12.000 |
| 107 | N | -N=N- (AZO) (LOCAL) | 14.003 |
| 108 | N | N-OH (OXIME) | 14.003 |
| 109 | N | -N=, AZOXY (LOCAL) | 14.003 |
| 110 | N+ | -N(+)= (IMMINIUM) | 14.003 |
| 111 | N+ | -N(+)= (PYRIDINIUM) | 14.003 |
| 112 | * | not used | 999.000 |
| 113 | CH | C(FERROCENE-H) | 12.000 |
| 114 | CP | C(FERROCENE-C) | 12.000 |
| 115 | O | O=C(C=O)(C=O) | 15.995 |
| 116 | O | O=C(C=O)(OH) | 15.995 |
| 117 | O | O=C(C=O)(OC) | 15.995 |
| 118 | O | O=C(C=O)(N<) | 15.995 |
| 119 | O | O=C(C=O)(X) | 15.995 |
| 120 | O | O=C(C=O)(C=C<) | 15.995 |
| 121 | O | O=C(C=O)(O-C=O) | 15.995 |
| 122 | * | not used | 999.000 |
| 123 | * | not used | 999.000 |
| 124 | H | H-C ACETYLENE | 1.008 |
| 125 | Ca | CALCIUM | 39.963 |
| 126 | Sr | STRONTIUM | 87.906 |
| 127 | Ba | BARIUM | 137.905 |
| 128 | La | LANTHANUM | 138.906 |
| 129 | Ce | CERIUM | 139.905 |
| 130 | Pr | PRAESEODYMIUM | 140.907 |
| 131 | Nd | NEODYMIUM | 141.908 |
| 132 | Pm | PROMETHIUM | 145.000 |
| 133 | Sm | SAMARIUM | 151.920 |
| 134 | Eu | EUROPIUM | 152.921 |
| 135 | Gd | GADOLINIUM | 157.924 |
| 136 | Tb | TERBIUM | 159.925 |
| 137 | Dy | DYSPROSIUM | 163.929 |
| 138 | Ho | HOLMIUM | 164.930 |
| 139 | Er | ERBIUM | 165.930 |
| 140 | Tm | THULIUM | 168.934 |
| 141 | Yb | YTTERBIUM | 173.939 |
| 142 | Lu | LUTETIUM | 174.941 |
| 143 | N | =N-O, AZOXY (DELO.) | 14.003 |
| 144 | N | -N=, AZOXY (DELO.) | 14.003 |
| 145 | O | >N-OH (HYDROXYAMINE) | 15.995 |
| 146 | N | >N-OH (HYDROXYAMINE) | 14.003 |
| 147 | * | not used | 999.000 |
| 148 | O | -O-(ANHYDRIDES-LOCL) | 15.995 |
| 149 | O | -O-(ANHYDRIDES-DELO) | 15.995 |
| 150 | N | NSP3(HYDRAZINE) | 14.003 |
| 151 | N | NSP2(AMIDE-DELCO) | 14.003 |
| 152 | * | not used | 999.000 |
| 153 | P | >P=O PHOSPHATE | 30.994 |
| 154 | S | >SO2 (SULFONAMIDE) | 31.972 |
| 155 | N | NSP3 (SULFONAMIDE) | 14.003 |
| 200 | Du | Dummy | 0.001 |