Atomic Radius (pm)

Elementsvan der WaalsIonicCovalent
H 120-145 37
Li 180 90 134
C 165-170 77
N 155 75
O 150 126 73
F 150-160 119 71
Na 230 116 154
Cl 170-190 167 99
K 280 152 196
Br 180-200 182 114
Rb 166
I 195-212 206 133
Cs 181



Energy Conversion Factors

J erg eV cm-1hartree kcal/mol
1 J = 1 107 6.2415x10185.0340x1022 2.2937x10171.4393x1020
1 erg = 10-7 1 6.2415x10115.0340x1015 2.2937x10101.4393x1013
1 eV = 1.6022x10-19 1.6022x10-121 8065.5 3.6749x10-223.060
1 cm-1 = 1.9865x10-23 1.9865x10-161.2398x10-41 4.5563x10-62.8591x10-3
1 hartree = 4.3598x10-18 4.3598x10-1127.212 219474.6 1 627.51
1 kcal/mol = 6.9478x10-21 6.9478x10-144.3364x10-2349.75 1.5936x10-31



Cylindrical Coordinates

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