SMARTS weight symbol [#1] 1.01 H [#2] 4.00 He [#3] 6.94 Li [#4] 9.01 Be [#5] 10.81 B [#6] 12.01 C [#7] 14.01 N [#8] 16.00 O [#9] 19.00 F [#10] 20.18 Ne [#11] 22.99 Na [#12] 24.31 Mg [#13] 26.98 Al [#14] 28.09 Si [#15] 30.97 P [#16] 32.06 S [#17] 35.45 Cl [#18] 39.95 Ar [#19] 39.10 K [#20] 40.08 Ca [#21] 44.96 Sc [#22] 47.88 Ti [#23] 50.94 V [#24] 52.00 Cr [#25] 54.94 Mn [#26] 55.85 Fe [#27] 58.93 Co [#28] 58.69 Ni [#29] 63.55 Cu [#30] 65.39 Zu [#31] 69.72 Ga [#32] 72.59 Ge [#33] 74.92 As [#34] 78.96 Se [#35] 79.90 Br [#36] 83.80 Kr [#37] 85.47 Rb [#38] 87.62 Sr [#39] 88.91 Y [#40] 91.22 Zr [#41] 92.91 Nb [#42] 95.94 Mo [#43] 98.00 Tc [#44] 101.07 Ru [#45] 102.91 Rh [#46] 106.42 Pd [#47] 107.87 Ag [#48] 112.41 Cd [#49] 114.82 In [#50] 118.71 Sn [#51] 121.75 Sb [#52] 127.60 Te [#53] 126.91 I [#54] 131.29 Xe [#55] 132.91 Cs [#56] 137.34 Ba [#57] 138.91 La [#58] 140.12 Ce [#59] 140.91 Pr [#60] 144.24 Nd [#61] 145.00 Pm [#62] 150.36 Sm [#63] 151.96 Eu [#64] 157.25 Gd [#65] 158.93 Tb [#66] 162.50 Dy [#67] 164.93 Ho [#68] 167.26 Er [#69] 168.93 Tm [#70] 173.04 Yb [#71] 174.97 Lu [#72] 178.49 Hf [#73] 180.95 Ta [#74] 183.85 W [#75] 186.21 Re [#76] 190.20 Os [#77] 192.22 Ir [#78] 195.08 Pt [#79] 196.97 Au [#80] 200.59 Hg [#81] 204.38 Tl [#82] 207.20 Pb [#83] 208.98 Bi [#84] 209.00 Po [#85] 210.00 At [#86] 222.00 Rn [#87] 223.00 Fr [#88] 226.03 Ra [#89] 227.03 Ac [#90] 232.04 Th [#91] 231.04 Pa [#92] 238.03 U [#93] 237.05 Np [#94] 244.00 Pu [#95] 243.00 Am [#96] 247.00 Cm [#97] 247.00 Bk [#98] 251.00 Cf [#99] 252.00 Es [#100] 257.00 Fm [#101] 258.00 Md [#102] 259.00 No [#103] 260.00 Lr [*;h1] 1.01 H1 [*;h2] 2.02 H2 [*;h3] 3.03 H3 [*;h4] 4.04 H4 [*;h5] 5.05 H5 [*;h6] 6.06 H6