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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.