1IA1A

18VIIIA8A

2IIA2A

13IIIA3A

14IVA4A

15VA5A

16VIA6A

17VIIA7A

3IIIB3B

4IVB4B

5VB5B

6VIB6B

7VIIB7B

8 9VIII8

10 11IB1B

12IIB2B

Periodic Table of the Elements

LanthanideSeries

ActinideSeries

1

HHydrogen

[1.00784;1.00811]

3

LiLithium[6.938;6.997]

4

BeBeryllium9.0121831(5)

11

NaSodium

22.98976928(2)

12

MgMagnesium[24.304,24.307]

19

KPotassium39.0983(1)

20

CaCalcium40.078(4)

21

ScScandium44.955908(5)

22

TiTitanium47.867(1)

23

VVanadium50.9415(1)

24

CrChromium51.9961(6)

25

MnManganese54.938045(5)

26

FeIron

55.845(2)

27

CoCobalt

58.933194(4)

28

NiNickel58.6934(4)

29

CuCopper63.546(3)

30

ZnZinc65.38(2)

31

GaGallium69.723(1)

13

AlAluminum26.9815386(8)

5

BBoron

[10.806;10.821]

32

GeGermanium

72.630(8)

14

SiSilicon

[28.084;28.086]

6

CCarbon

[12.0096;12.0116]

33

AsArsenic74.921595(6)

15

PPhosphorus30.973761998(5)

7

NNitrogen

[14.00643;14.00728]

34

SeSelenium78.971(8)

16

SSulfur

[32.059;32.076]

8

OOxygen

[15.99903;15.99977]

35

BrBromine

[79.901,79.907]

17

ClChlorine

[35.446;35.457]

9

FFluorine

18.998403163(6)

36

KrKrypton83.798(2)

18

ArArgon39.948(1)

10

NeNeon

20.1797(6)

2

HeHelium4.002602(2)

37

RbRubidium85.4678(3)

38

SrStrontium87.62(1)

39

YYttrium88.90584(2)

40

ZrZirconium91.224(2)

41

NbNiobium92.90637(2)

42

MoMolybdenum

95.95(1)

43

TcTechnetium

44

RuRuthenium101.07(2)

45

RhRhodium102.90550(2)

46

PdPalladium106.42(1)

47

AgSilver

107.8682(2)

48

CdCadmium112.414(4)

49

InIndium114.818(1)

50

SnTin

118.710(7)

51

SbAntimony121.760(1)

52

TeTellurium127.60(3)

53

IIodine

126.90447(3)

54

XeXenon131.293(6)

55

CsCesium

132.90545196(6)

56

BaBarium137.327(7)

57-71 72

HfHafnium178.49(2)

73

TaTantalum180.94788(2)

74

WTungsten183.84(1)

75

ReRhenium186.207(1)

76

OsOsmium190.23(3)

77

IrIridium192.217(3)

78

PtPlatinum195.084(9)

79

AuGold

196.966569(5)

80

HgMercury200.592(3)

81

TlThallium

[204.382;204.385]

82

PbLead207.2(1)

83

BiBismuth208.98040(1)

84

PoPolonium

85

AtAstatine

86

RnRadon

87

FrFrancium

88

RaRadium

89-103

57

LaLanthanum138.90547(7)

58

CeCerium140.116(1)

59

PrPraseodymium

140.90766(2)

60

NdNeodymium

144.242(3)

61

PmPromethium

62

SmSamarium150.36(2)

63

EuEuropium151.964(1)

64

GdGadolinium

157.25(3)

65

TbTerbium158.92535(2)

66

DyDysprosium162.500(1)

67

HoHolmium164.93033(2)

68

ErErbium167.259(3)

69

TmThulium168.93422(2)

70

YbYtterbium173.054(5)

71

LuLutetium174.9668(1)

89

AcActinium

90

ThThorium232.0377(4)

91

PaProtactinium231.03588(2)

92

UUranium238.02891(3)

93

NpNeptunium

94

PuPlutonium

95

AmAmericium

96

CmCurium

97

BkBerkelium

98

CfCalifornium

99

EsEinsteinium

100

FmFermium

101

MdMendelevium

102

NoNobelium

103

LrLawrencium

104

RfRutherfordium

105

DbDubnium

106

SgSeaborgium

107

BhBohrium

108

HsHassium

109

MtMeitnerium

110

DsDarmstadtium

111

RgRoentgenium

112

CnCopernicium

113

UutUnuntriumunknown

114

FlFlerovium

115

UupUnunpentium

unknown

116

LvLivermorium

117

UusUnunseptium

unknown

118

UuoUnunoctium

unknown

AtomicNumber

Symbol

Atomic MassName

Atomic mass values reect the IUPAC accepted values as of 09/2013.

Masses expressed in [a;b] format show the lower and upper limit of atomic mass depending on the physical and chemical history of the element.

Masses expressed in < > format are the mass numbers of the longest-lived isotope for elements with no stable nucleus.