Atomic Radii (ionic radii are below)
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Atom | Atomic No. | Atomic Radius (pm) |
---|---|---|
H | 1 | 37 |
He | 2 | 31 |
Li | 3 | 157 |
Be | 4 | 112 |
B | 5 | 86 |
C | 6 | 77 |
N | 7 | 74 |
O | 8 | 74 |
F | 9 | 72 |
Ne | 10 | 68 |
Na | 11 | 191 |
Mg | 12 | 160 |
Al | 13 | 143 |
Si | 14 | 117 |
P | 15 | 110 |
S | 16 | 104 |
Cl | 17 | 99 |
Ar | 18 | 91 |
K | 19 | 235 |
Ca | 20 | 197 |
Sc | 21 | 164 |
Ti | 22 | 147 |
V | 23 | 135 |
Cr | 24 | 129 |
Mn | 25 | 137 |
Fe | 26 | 126 |
Co | 27 | 125 |
Ni | 28 | 125 |
Cu | 29 | 126 |
Zn | 30 | 137 |
Ga | 31 | 153 |
Ge | 32 | 130.5 |
As | 33 | 121 |
Se | 34 | 117 |
Br | 35 | 114 |
Kr | 36 | 108 |
Rb | 37 | 250 |
Sr | 38 | 215 |
Y | 39 | 182 |
Zr | 40 | 160 |
Nb | 41 | 147 |
Mo | 42 | 140 |
Tc | 43 | 135 |
Ru | 44 | 134 |
Rh | 45 | 134 |
Pd | 46 | 137 |
Ag | 47 | 144 |
Cd | 48 | 152 |
In | 49 | 167 |
Sn | 50 | 149 |
Sb | 51 | 151 |
Te | 52 | 137 |
I | 53 | 133 |
Xe | 54 | 126 |
Cs | 55 | 272 |
Ba | 56 | 224 |
La | 57 | 188 |
Ce | 58 | 182 |
Pr | 59 | 181 |
Nd | 60 | 180 |
Pm | 61 | 179 |
Sm | 62 | 179 |
Eu | 63 | 206 |
Gd | 64 | 178 |
Tb | 65 | 177 |
Dy | 66 | 176 |
Ho | 67 | 175 |
Er | 68 | 174 |
Tm | 69 | 173 |
Yb | 70 | 194 |
Lu | 71 | 172 |
Hf | 72 | 159 |
Ta | 73 | 147 |
W | 74 | 141 |
Re | 75 | 137 |
Os | 76 | 135 |
Ir | 77 | 136 |
Pt | 78 | 139 |
Au | 79 | 144 |
Hg | 80 | 155 |
Tl | 81 | 171 |
Pb | 82 | 175 |
Bi | 83 | 182 |
Po | 84 | 174 |
At | 85 | 166 |
Rn | 86 | 159 |
Fr | 87 | |
Ra | 88 | |
Ac | 89 | |
Th | 90 | 180 |
Pa | 91 | 163 |
U | 92 | 156 |
Np | 93 | 156 |
Pu | 94 | 164 |
Am | 95 | 173 |
Cm | 96 | 155 |
Bk | 97 | 170 |
Cf | 98 | |
Es | 99 | |
Fm | 100 | |
Md | 101 | |
No | 102 | |
Lr | 103 | |
Wells, A. F. Structural Inorganic Chemistry, 5th ed., Clarendon: Oxford, 1984, p 289 and 1288. Slater, J. C. J. Chem. Phys. 1964, 41, 3199. Clementi, E; Raimondi, D. L.; Reinhardt, W. P. J. Chem. Phys. 1967, 47(4), 1300-1307. |
Ionic Radius
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Ion Species | Atomic No. | Ionic Radius (pm) |
---|---|---|
H +1 | 1 | |
He | 2 | |
Li +1 | 3 | 90 |
Be +2 | 4 | 59 |
B +3 | 5 | 41 |
C +4 | 6 | 30 |
N -3 | 7 | |
N +3 | 7 | 30 |
N +5 | 7 | 27 |
O -2 | 8 | 126 |
F -1 | 9 | 119 |
F +7 | 9 | 22 |
Ne | 10 | |
Na +1 | 11 | 116 |
Mg +2 | 12 | 86 |
Al +3 | 13 | 67.5 |
Si +4 | 14 | 54 |
P +3 | 15 | 58 |
P +5 | 15 | 52 |
S -2 | 16 | 170 |
S +4 | 16 | 51 |
S +6 | 16 | 43 |
Cl -1 | 17 | 167 |
Cl +5 | 17 | |
Cl +7 | 17 | 41 |
Ar | 18 | |
K +1 | 19 | 152 |
Ca +2 | 20 | 114 |
Sc +3 | 21 | 88.5 |
Ti +2 | 22 | 100 |
Ti +3 | 22 | 81 |
Ti +4 | 22 | 74.5 |
V +2 | 23 | 93 |
V +3 | 23 | 78 |
V +4 | 23 | 72 |
V +5 | 23 | 68 |
Cr +2 | 24 | 94 |
Cr +3 | 24 | 75.5 |
Cr +4 | 24 | 69 |
Cr +5 | 24 | 63 |
Cr +6 | 24 | 58 |
Mn +2 | 25 | 97 |
Mn +3 | 25 | 78.5 |
Mn +4 | 25 | 67 |
Mn +5 | 25 | |
Mn +6 | 25 | |
Mn +7 | 25 | 60 |
Fe +2 | 26 | 92 |
Fe +3 | 26 | 78.5 |
Fe +4 | 26 | 72.5 |
Fe +6 | 26 | |
Co +2 | 27 | 88.5 |
Co +3 | 27 | 75 |
Co +4 | 27 | 67 |
Ni +2 | 28 | 83 |
Ni +3 | 28 | 74 |
Ni +4 | 28 | 62 |
Cu +1 | 29 | 91 |
Cu +2 | 29 | 87 |
Cu +3 | 29 | 68 |
Zn +2 | 30 | 88 |
Ga +3 | 31 | 76 |
Ge +2 | 32 | 87 |
Ge +4 | 32 | 67 |
As +3 | 33 | 72 |
As +5 | 33 | 60 |
Se -2 | 34 | 184 |
Se +4 | 34 | 64 |
Se +6 | 34 | 56 |
Br -1 | 35 | 182 |
Br +3 | 35 | |
Br +5 | 35 | |
Br +7 | 35 | 53 |
Kr | 36 | |
Rb +1 | 37 | 166 |
Sr +2 | 38 | 132 |
Y +3 | 39 | 104 |
Zr +4 | 40 | 86 |
Nb +3 | 41 | 86 |
Nb +4 | 41 | 82 |
Nb +5 | 41 | 78 |
Mo +3 | 42 | 83 |
Mo +4 | 42 | 79 |
Mo +5 | 42 | 75 |
Mo +6 | 42 | 73 |
Tc +4 | 43 | 78.5 |
Tc +5 | 43 | 74 |
Tc +7 | 43 | 70 |
Ru +3 | 44 | 82 |
Ru +4 | 44 | 76 |
Ru +5 | 44 | 70.5 |
Ru +7 | 44 | |
Ru +8 | 44 | |
Rh +3 | 45 | 80.5 |
Rh +4 | 45 | 74 |
Rh +5 | 45 | 69 |
Pd +1 | 46 | |
Pd +2 | 46 | 100 |
Pd +3 | 46 | 90 |
Pd +4 | 46 | 75.5 |
Ag +1 | 47 | 129 |
Ag +2 | 47 | 108 |
Ag +3 | 47 | 89 |
Cd +2 | 48 | 109 |
In +3 | 49 | 94 |
Sn +4 | 50 | 83 |
Sb +3 | 51 | 90 |
Sb +5 | 51 | 74 |
Te -2 | 52 | 207 |
Te +4 | 52 | 111 |
Te +6 | 52 | 70 |
I -1 | 53 | 206 |
I +5 | 53 | |
I +7 | 53 | 67 |
Xe +8 | 54 | 62 |
Cs +1 | 55 | 181 |
Ba +2 | 56 | 149 |
La +3 | 57 | 117.2 |
Ce +3 | 58 | 115 |
Ce +4 | 58 | 101 |
Pr +3 | 59 | 113 |
Pr +4 | 59 | 99 |
Nd +2 | 60 | |
Nd +3 | 60 | 112.3 |
Pm +3 | 61 | 111 |
Sm +2 | 62 | |
Sm +3 | 62 | 109.8 |
Eu +2 | 63 | 131 |
Eu +3 | 63 | 108.7 |
Gd +3 | 64 | 107.8 |
Tb +3 | 65 | 106.3 |
Tb +4 | 65 | 90 |
Dy +2 | 66 | 121 |
Dy +3 | 66 | 105.2 |
Ho +3 | 67 | 104.1 |
Er +3 | 68 | 103 |
Tm +2 | 69 | 117 |
Tm +3 | 69 | 102 |
Yb +2 | 70 | 116 |
Yb +3 | 70 | 100.8 |
Lu +3 | 71 | 100.1 |
Hf +4 | 72 | 85 |
Ta +3 | 73 | 86 |
Ta +4 | 73 | 82 |
Ta +5 | 73 | 78 |
W +4 | 74 | 80 |
W +5 | 74 | 76 |
W +6 | 74 | 74 |
Re +4 | 75 | 77 |
Re +5 | 75 | 72 |
Re +6 | 75 | 69 |
Re +7 | 75 | 67 |
Os +4 | 76 | 77 |
Os +5 | 76 | 71.5 |
Os +6 | 76 | 68.5 |
Os +7 | 76 | 66.5 |
Os +8 | 76 | |
Ir +3 | 77 | 82 |
Ir +4 | 77 | 76.5 |
Ir +5 | 77 | 71 |
Pt +2 | 78 | 94 |
Pt +4 | 78 | 76.5 |
Pt +5 | 78 | 71 |
Au +1 | 79 | 151 |
Au +3 | 79 | 99 |
Au +5 | 79 | 71 |
Hg +1 | 80 | 133 |
Hg +2 | 80 | 116 |
Tl +1 | 81 | 164 |
Tl +3 | 81 | 102.5 |
Pb +2 | 82 | 133 |
Pb +4 | 82 | 91.5 |
Bi +3 | 83 | 117 |
Bi +5 | 83 | 90 |
Po +4 | 84 | 108 |
Po +6 | 84 | 81 |
At +7 | 85 | 76 |
Rn | 86 | |
Fr +1 | 87 | 194 |
Ra +2 | 88 | |
Ac+3 | 89 | 126 |
Th +4 | 90 | 108 |
Pa +3 | 91 | 118 |
Pa +4 | 91 | 104 |
Pa +5 | 91 | 92 |
U +3 | 92 | 116.5 |
U +4 | 92 | 103 |
U +5 | 92 | 90 |
U +6 | 92 | 87 |
Np +2 | 93 | 124 |
Np +3 | 93 | 115 |
Np +4 | 93 | 101 |
Np +5 | 93 | 89 |
Np +6 | 93 | 86 |
Np +7 | 93 | 85 |
Pu +3 | 94 | 114 |
Pu +4 | 94 | 100 |
Pu +5 | 94 | 88 |
Pu +6 | 94 | 85 |
Am +2 | 95 | |
Am +3 | 95 | 111.5 |
Am +4 | 95 | 99 |
Cm +3 | 96 | 111 |
Cm +4 | 96 | 99 |
Bk +3 | 97 | 110 |
Bk +4 | 97 | 97 |
Cf +3 | 98 | 109 |
Cf +4 | 98 | 96.1 |
Es | 99 | |
Fm | 100 | |
Md | 101 | |
No +2 | 102 | 124 |
Lr | 103 | |
Shannon, R. D. Acta Cryst. 1976, A32, 751-767. |
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