Modern Periodic Table of Elements

Covalent Radius

1 H Hydrogen 31

3 Li Lithium 128

4 Be Beryllium 96

7 N Nitrogen 71

9 F Fluorine 57

11 Na Sodium 166

12 Mg Magnesium 141

13 Al Aluminium 121

14 Si Silicon 111

15 P Phosphorus 107

16 S Sulphur 105

17 Cl Chlorine 102

18 Ar Argon 106

19 K Potassium 203

20 Ca Calcium 176

21 Sc Scandium 170

22 Ti Titanium 160

23 V Vanadium 153

24 Cr Chromium 139

25 Mn Manganese 139

27 Co Cobalt 126

28 Ni Nickel 124

29 Cu Copper 132

31 Ga Galium 122

32 Ge Germanium 120

33 As Arsenic 119

34 Se Selenium 120

35 Br Bromine 120

36 Kr Krypton 116

37 Rb Rubidium 220

38 Sr Strontium 195

39 Y Yttrium 190

40 Zr Zirconium 175

41 Nb Niobium 164

42 Mo Molybdenum 154

43 Tc Technetium 147

44 Ru Ruthenium 146

45 Rh Rhodium 142

46 Pd Palladium 139

47 Ag Silver 145

48 Cd Cadmium 144

49 In Indium 142

51 Sb Antimony 139

52 Te Tellurium 138

53 I Iodine 139

54 Xe Xenon 140

55 Cs Caesium 244

56 Ba Barium 215

57 La Lanthanum 207

58 Ce Cerium 204

59 Pr Praseodymium 203

60 Nd Neodymium 201

61 Pm Promethium 199

62 Sm Samarium 198

63 Eu Europium 198

64 Gd Gadolinium 196

65 Tb Terbium 194

66 Dy Dysprosium 192

67 Ho Holmium 192

68 Er Erbium 189

69 Tm Thulium 190

70 Yb Ytterbium 187

71 Lu Lutetium 187

72 Hf Hafnium 175

73 Ta Tantalum 170

74 W Tungsten 162

75 Re Rhenium 151

76 Os Osmium 144

77 Ir Iridium 141

78 Pt Platinum 136

80 Hg Mercury 132

81 Tl Thallium 145

83 Bi Bismuth 148

84 Po Polonium 140

85 At Astatine 150

86 Rn Radon 250

87 Fr Francium 260

88 Ra Radium 221

89 Ac Actinium 215

90 Th Thorium 206

91 Pa Protactinium 200

92 U Uranium 196

93 Np Neptunium 190

94 Pu Plutonium 187

94 Am Americium 180

96 Cm Curium 180