LIST OF THE KNOWN ELEMENTS

Atomic Number

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

LIST OF THE KNOWN ELEMENTS

M. Ragheb 11/8/2006

Symbol

n H He Li Be B C N O F Ne Na Mg Al

Si P S

Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr

Name

Neutron Hydrogen

Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine

Neon Sodium Magnesium Aluminum, Aluminium Silicon Phosphorus Sulphur, Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese

Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium

Atomic Weight (amu)

1.008665 1.007940 4.002602 6.941000 9.012182 10.811000 12.010700 14.006740 15.999400 18.9984032 20.179700 22.989770 24.305000 26.981538

28.085500 30.973761 32.066000

35.452700 39.948000 39.098300 40.078000 44.955910 47.867000 50.941500 51.996100 54.938049 55.845000 58.933200 58.693400 63.546000 65.390000 69.723000 72.610000 74.921600 78.960000 79.904000 83.800000 85.467800 87.620000 88.905850 91.224000

Density [gm/cm3]

0.0000899 0.0001787

0.53 1.848 2.34 2.62 0.0012506 0.001429 0.001696 0.0009 0.971 1.738 2.702

2.33 1.82 2.07

0.003214 0.0017824

0.862 1.55 3.0 4.50 5.8 7.19 7.43 7.86 8.90 8.90 8.96 7.14 5.907 5.323 5.72 4.79 3.119 0.003708 1.53 2.6 4.47 6.4

41

Nb

42

Mo

43

Tc

44

Ru

45

Rh

46

Pd

47

Ag

48

Cd

49

In

50

Sn

51

Sb

52

Te

53

I

54

Xe

55

Cs

56

Ba

Lanthanides,

Lanthanoids

57

La

58

Ce

59

Pr

60 Nd

61 Pm

62 Sm

63

Eu

64 Gd

65

Tb

66 Dy

67 Ho

68

Er

69 Tm

70 Yb

71

Lu

72

Hf

73

Ta

74

W

75

Re

76

Os

77

Ir

78

Pt

79

Au

80

Hg

81

Tl

82

Pb

83

Bi

84

Po

85

At

86

Rn

Niobium, Columbium Molybdenum Technetium Ruthenium

Rhodium Palladium

Silver Cadmium

Indium Tin

Antimony Tellurium

Iodine Xenon Cesium, Caesium Barium

Lanthanum Cerium

Praseodymium Neodymium Promethium Samarium

Europium Gadolinium

Terbium Dysprosium

Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten, Wolfram Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon

92.906380

95.940000 [97.907200] 101.070000 102.905500 106.420000 107.868200 112.411000 114.818000 118.710000 121.760000 127.600000 126.904470 131.290000 132.905450

137.327000

138.905500 140.116000 140.907650 144.240000 [144.912700] 150.360000 151.964000 157.250000 158.925340 162.500000 164.930320 167.260000 168.934210 173.040000 174.967000 178.490000 180.947900 183.840000

186.207000 190.230000 192.217000 195.078000 196.966550 200.590000 204.383300 207.200000 208.980380 [208.982400] [209.987100] [222.017600]

8.57

10.2 11.5 12.2 12.4 12.02 10.5 8.65 7.31 7.30 6.684 6.24 4.93 0.00588 1.873

3.51

6.7

7.0 6.475 7.54 5.259 7.895 8.27 8.536 8.80 9.05 9.33 6.98 9.85 13.2 16.6 19.3

22.40 22.42

19.32 13.546 11.85 11.34

9.8 9.4

0.00973

87

Fr

88

Ra

Actinides,

Actinoids

89

Ac

90

Th

91

Pa

92

U

93 Np

94

Pu

95 Am

96 Cm

97

Bk

98

Cf

99

Es

100 Fm

101 Md

102 No

103

Lr

104

Rf

105

Db

106

Sg

107

Bh

108

Hs

109

Mt

110

Uun

111

Uuu

112

Uub

-

114

Uuq

-

116

Uuh

-

118

Uuo

Francium Radium

Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Kurchatovium? Dubnium Hahnium? Seaborgium Bohrium Hassium Meitnerium Ununnnilium Unununium Ununbium

Ununquadium

Ununhexium

Ununoctium

[223.019700] [226.025400]

[227.027700] 232.038100 231.035880 238.028900 [237.048200] [244.064200] [243.061400] [247.070300] [247.070300] [251.079600] [252.083000] [257.095100] [258.098400] [259.100900] [262.109700] [261.108800]

[262.114200]

[266.121900] [264.124700] [269.134100] [268.138800] [271.146100] [272.153500] [277.000000]

[289.000000]

[289.000000]

[293.000000]

5.0

10.07 11.7 15.4 18.9 20.45 19.8 13.6 13.5

N.B.: Values in square brackets are for elements without naturally stable nuclides. The values listed are for the longest-lived isotope.

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