1IA

11A

18VIIIA8A

2IIA2A

13IIIA3A

14IVA4A

15VA5A

16VIA6A

17VIIA7A

3IIIB3B

4IVB4B

5VB5B

6VIB6B

7VIIB7B

8 9VIII8

10 11IB1B

12IIB2B

Periodic Table of the Elements

LanthanideSeries

ActinideSeries

© 2013 Todd Helmenstinechemistry.about.comsciencenotes.org

1

HHydrogen1.008

3

LiLithium6.941

4

BeBeryllium9.012

11

NaSodium22.990

12

MgMagnesium24.305

19

KPotassium39.098

20

CaCalcium40.078

21

ScScandium44.956

22

TiTitanium47.88

23

VVanadium50.942

24

CrChromium51.996

25

MnManganese54.938

26

FeIron

55.933

27

CoCobalt58.933

28

NiNickel58.693

29

CuCopper63.546

30

ZnZinc65.39

31

GaGallium69.732

13

AlAluminum26.982

5

BBoron10.811

32

GeGermanium72.61

14

SiSilicon28.086

6

CCarbon12.011

33

AsArsenic74.922

15

PPhosphorus30.974

7

NNitrogen14.007

34

SeSelenium78.09

16

SSulfur32.066

8

OOxygen15.999

35

BrBromine79.904

17

ClChlorine35.453

9

FFluorine18.998

36

KrKrypton84.80

18

ArArgon39.948

10

NeNeon20.180

2

HeHelium4.003

37

RbRubidium84.468

38

SrStrontium87.62

39

YYttrium88.906

40

ZrZirconium91.224

41

NbNiobium92.906

42

MoMolybdenum

95.94

43

TcTechnetium98.907

44

RuRuthenium101.07

45

RhRhodium102.906

46

PdPalladium106.42

47

AgSilver107.868

48

CdCadmium112.411

49

InIndium114.818

50

SnTin

118.71

51

SbAntimony121.760

52

TeTellurium127.6

53

IIodine126.904

54

XeXenon131.29

55

CsCesium132.905

56

BaBarium137.327

57-71 72

HfHafnium178.49

73

TaTantalum180.948

74

WTungsten183.85

75

ReRhenium186.207

76

OsOsmium190.23

77

IrIridium192.22

78

PtPlatinum195.08

79

AuGold

196.967

80

HgMercury200.59

81

TlThallium204.383

82

PbLead207.2

83

BiBismuth208.980

84

PoPolonium[208.982]

85

AtAstatine209.987

86

RnRadon222.018

87

FrFrancium223.020

88

RaRadium226.025

89-103

57

LaLanthanum138.906

58

CeCerium140.115

59

PrPraseodymium140.908

60

NdNeodymium144.24

61

PmPromethium144.913

62

SmSamarium150.36

63

EuEuropium151.966

64

GdGadolinium157.25

65

TbTerbium158.925

66

DyDysprosium162.50

67

HoHolmium164.930

68

ErErbium167.26

69

TmThulium168.934

70

YbYtterbium173.04

71

LuLutetium174.967

89

AcActinium227.028

90

ThThorium232.038

91

PaProtactinium231.036

92

UUranium238.029

93

NpNeptunium237.048

94

PuPlutonium244.064

95

AmAmericium243.061

96

CmCurium247.070

97

BkBerkelium247.070

98

CfCalifornium251.080

99

EsEinsteinium[254]

100

FmFermium257.095

101

MdMendelevium

258.1

102

NoNobelium259.101

103

LrLawrencium[262]

104

RfRutherfordium

[261]

105

DbDubnium[262]

106

SgSeaborgium[266]

107

BhBohrium[264]

108

HsHassium[269]

109

MtMeitnerium[268]

110

DsDarmstadtium

[269]

111

RgRoentgenium

[272]

112

CnCopernicium

[277]

113

UutUnuntriumunknown

114

FlFlerovium[289]

115

UupUnunpentiumunknown

116

LvLivermorium

[298]

117

UusUnunseptiumunknown

118

UuoUnunoctiumunknown