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

© 2013 Todd Helmenstinechemistry.about.comsciencenotes.org

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

<98>

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

<209>

85

AtAstatine<210>

86

RnRadon<222>

87

FrFrancium

<223>

88

RaRadium<226>

89-103

57

LaLanthanum138.90547(7)

58

CeCerium140.116(1)

59

PrPraseodymium

140.90766(2)

60

NdNeodymium

144.242(3)

61

PmPromethium

<145>

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

<227>

90

ThThorium232.0377(4)

91

PaProtactinium231.03588(2)

92

UUranium238.02891(3)

93

NpNeptunium

<237>

94

PuPlutonium

<244>

95

AmAmericium

<243>

96

CmCurium<247>

97

BkBerkelium

<247>

98

CfCalifornium

<251>

99

EsEinsteinium

<252>

100

FmFermium

<257>

101

MdMendelevium

<258>

102

NoNobelium

<259>

103

LrLawrencium

<262>

104

RfRutherfordium

<267>

105

DbDubnium

<268>

106

SgSeaborgium

<271>

107

BhBohrium<272>

108

HsHassium<270>

109

MtMeitnerium

<276>

110

DsDarmstadtium

<281>

111

RgRoentgenium

<280>

112

CnCopernicium

<285>

113

UutUnuntriumunknown

114

FlFlerovium

<289>

115

UupUnunpentium

unknown

116

LvLivermorium

<293>

117

UusUnunseptium

unknown

118

UuoUnunoctium

unknown

AtomicNumber

Symbol

Atomic MassName

Atomic mass values re�ect 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 < > fromat are the mass numbers of the longest-lived isotope for elements with no stable nucleus.