periodic table

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Last updated 1:45 AM on 9/8/26
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118 Terms

1
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Hydrogen

Symbol: HH, Atomic Number: 11, Atomic Mass: 1.008u1.008\,\text{u}

2
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Helium

Symbol: HeHe, Atomic Number: 22, Atomic Mass: 4.0026u4.0026\,\text{u}

3
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Lithium

Symbol: LiLi, Atomic Number: 33, Atomic Mass: 6.94u6.94\,\text{u}

4
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Beryllium

Symbol: BeBe, Atomic Number: 44, Atomic Mass: 9.0122u9.0122\,\text{u}

5
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Boron

Symbol: BB, Atomic Number: 55, Atomic Mass: 10.81u10.81\,\text{u}

6
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Carbon

Symbol: CC, Atomic Number: 66, Atomic Mass: 12.011u12.011\,\text{u}

7
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Nitrogen

Symbol: NN, Atomic Number: 77, Atomic Mass: 14.007u14.007\,\text{u}

8
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Oxygen

Symbol: OO, Atomic Number: 88, Atomic Mass: 15.999u15.999\,\text{u}

9
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Fluorine

Symbol: FF, Atomic Number: 99, Atomic Mass: 18.998u18.998\,\text{u}

10
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Neon

Symbol: NeNe, Atomic Number: 1010, Atomic Mass: 20.180u20.180\,\text{u}

11
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Sodium

Symbol: NaNa, Atomic Number: 1111, Atomic Mass: 22.990u22.990\,\text{u}

12
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Magnesium

Symbol: MgMg, Atomic Number: 1212, Atomic Mass: 24.305u24.305\,\text{u}

13
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Aluminium

Symbol: AlAl, Atomic Number: 1313, Atomic Mass: 26.982u26.982\,\text{u}

14
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Silicon

Symbol: SiSi, Atomic Number: 1414, Atomic Mass: 28.085u28.085\,\text{u}

15
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Phosphorus

Symbol: PP, Atomic Number: 1515, Atomic Mass: 30.974u30.974\,\text{u}

16
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Sulfur

Symbol: SS, Atomic Number: 1616, Atomic Mass: 32.06u32.06\,\text{u}

17
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Chlorine

Symbol: ClCl, Atomic Number: 1717, Atomic Mass: 35.45u35.45\,\text{u}

18
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Argon

Symbol: ArAr, Atomic Number: 1818, Atomic Mass: 39.948u39.948\,\text{u}

19
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Potassium

Symbol: KK, Atomic Number: 1919, Atomic Mass: 39.098u39.098\,\text{u}

20
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Calcium

Symbol: CaCa, Atomic Number: 2020, Atomic Mass: 40.078u40.078\,\text{u}

21
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Scandium

Symbol: ScSc, Atomic Number: 2121, Atomic Mass: 44.956u44.956\,\text{u}

22
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Titanium

Symbol: TiTi, Atomic Number: 2222, Atomic Mass: 47.867u47.867\,\text{u}

23
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Vanadium

Symbol: VV, Atomic Number: 2323, Atomic Mass: 50.942u50.942\,\text{u}

24
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Chromium

Symbol: CrCr, Atomic Number: 2424, Atomic Mass: 51.996u51.996\,\text{u}

25
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Manganese

Symbol: MnMn, Atomic Number: 2525, Atomic Mass: 54.938u54.938\,\text{u}

26
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Iron

Symbol: FeFe, Atomic Number: 2626, Atomic Mass: 55.845u55.845\,\text{u}

27
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Cobalt

Symbol: CoCo, Atomic Number: 2727, Atomic Mass: 58.933u58.933\,\text{u}

28
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Nickel

Symbol: NiNi, Atomic Number: 2828, Atomic Mass: 58.693u58.693\,\text{u}

29
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Copper

Symbol: CuCu, Atomic Number: 2929, Atomic Mass: 63.546u63.546\,\text{u}

30
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Zinc

Symbol: ZnZn, Atomic Number: 3030, Atomic Mass: 65.38u65.38\,\text{u}

31
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Gallium

Symbol: GaGa, Atomic Number: 3131, Atomic Mass: 69.723u69.723\,\text{u}

32
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Germanium

Symbol: GeGe, Atomic Number: 3232, Atomic Mass: 72.630u72.630\,\text{u}

33
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Arsenic

Symbol: AsAs, Atomic Number: 3333, Atomic Mass: 74.922u74.922\,\text{u}

34
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Selenium

Symbol: SeSe, Atomic Number: 3434, Atomic Mass: 78.971u78.971\,\text{u}

35
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Bromine

Symbol: BrBr, Atomic Number: 3535, Atomic Mass: 79.904u79.904\,\text{u}

36
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Krypton

Symbol: KrKr, Atomic Number: 3636, Atomic Mass: 83.798u83.798\,\text{u}

37
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Rubidium

Symbol: RbRb, Atomic Number: 3737, Atomic Mass: 85.468u85.468\,\text{u}

38
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Strontium

Symbol: SrSr, Atomic Number: 3838, Atomic Mass: 87.62u87.62\,\text{u}

39
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Yttrium

Symbol: YY, Atomic Number: 3939, Atomic Mass: 88.906u88.906\,\text{u}

40
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Zirconium

Symbol: ZrZr, Atomic Number: 4040, Atomic Mass: 91.224u91.224\,\text{u}

41
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Niobium

Symbol: NbNb, Atomic Number: 4141, Atomic Mass: 92.906u92.906\,\text{u}

42
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Molybdenum

Symbol: MoMo, Atomic Number: 4242, Atomic Mass: 95.95u95.95\,\text{u}

43
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Technetium

Symbol: TcTc, Atomic Number: 4343, Atomic Mass: 98u98\,\text{u}

44
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Ruthenium

Symbol: RuRu, Atomic Number: 4444, Atomic Mass: 101.07u101.07\,\text{u}

45
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Rhodium

Symbol: RhRh, Atomic Number: 4545, Atomic Mass: 102.91u102.91\,\text{u}

46
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Palladium

Symbol: PdPd, Atomic Number: 4646, Atomic Mass: 106.42u106.42\,\text{u}

47
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Silver

Symbol: AgAg, Atomic Number: 4747, Atomic Mass: 107.87u107.87\,\text{u}

48
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Cadmium

Symbol: CdCd, Atomic Number: 4848, Atomic Mass: 112.41u112.41\,\text{u}

49
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Indium

Symbol: InIn, Atomic Number: 4949, Atomic Mass: 114.82u114.82\,\text{u}

50
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Tin

Symbol: SnSn, Atomic Number: 5050, Atomic Mass: 118.71u118.71\,\text{u}

51
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Antimony

Symbol: SbSb, Atomic Number: 5151, Atomic Mass: 121.76u121.76\,\text{u}

52
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Tellurium

Symbol: TeTe, Atomic Number: 5252, Atomic Mass: 127.60u127.60\,\text{u}

53
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Iodine

Symbol: II, Atomic Number: 5353, Atomic Mass: 126.90u126.90\,\text{u}

54
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Xenon

Symbol: XeXe, Atomic Number: 5454, Atomic Mass: 131.29u131.29\,\text{u}

55
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Cesium

Symbol: CsCs, Atomic Number: 5555, Atomic Mass: 132.91u132.91\,\text{u}

56
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Barium

Symbol: BaBa, Atomic Number: 5656, Atomic Mass: 137.33u137.33\,\text{u}

57
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Lanthanum

Symbol: LaLa, Atomic Number: 5757, Atomic Mass: 138.91u138.91\,\text{u}

58
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Cerium

Symbol: CeCe, Atomic Number: 5858, Atomic Mass: 140.12u140.12\,\text{u}

59
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Praseodymium

Symbol: PrPr, Atomic Number: 5959, Atomic Mass: 140.91u140.91\,\text{u}

60
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Neodymium

Symbol: NdNd, Atomic Number: 6060, Atomic Mass: 144.24u144.24\,\text{u}

61
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Promethium

Symbol: PmPm, Atomic Number: 6161, Atomic Mass: 145u145\,\text{u}

62
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Samarium

Symbol: SmSm, Atomic Number: 6262, Atomic Mass: 150.36u150.36\,\text{u}

63
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Europium

Symbol: EuEu, Atomic Number: 6363, Atomic Mass: 151.96u151.96\,\text{u}

64
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Gadolinium

Symbol: GdGd, Atomic Number: 6464, Atomic Mass: 157.25u157.25\,\text{u}

65
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Terbium

Symbol: TbTb, Atomic Number: 6565, Atomic Mass: 158.93u158.93\,\text{u}

66
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Dysprosium

Symbol: DyDy, Atomic Number: 6666, Atomic Mass: 162.50u162.50\,\text{u}

67
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Holmium

Symbol: HoHo, Atomic Number: 6767, Atomic Mass: 164.93u164.93\,\text{u}

68
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Erbium

Symbol: ErEr, Atomic Number: 6868, Atomic Mass: 167.26u167.26\,\text{u}

69
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Thulium

Symbol: TmTm, Atomic Number: 6969, Atomic Mass: 168.93u168.93\,\text{u}

70
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Ytterbium

Symbol: YbYb, Atomic Number: 7070, Atomic Mass: 173.05u173.05\,\text{u}

71
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Lutetium

Symbol: LuLu, Atomic Number: 7171, Atomic Mass: 174.97u174.97\,\text{u}

72
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Hafnium

Symbol: HfHf, Atomic Number: 7272, Atomic Mass: 178.49u178.49\,\text{u}

73
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Tantalum

Symbol: TaTa, Atomic Number: 7373, Atomic Mass: 180.95u180.95\,\text{u}

74
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Tungsten

Symbol: WW, Atomic Number: 7474, Atomic Mass: 183.84u183.84\,\text{u}

75
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Rhenium

Symbol: ReRe, Atomic Number: 7575, Atomic Mass: 186.21u186.21\,\text{u}

76
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Osmium

Symbol: OsOs, Atomic Number: 7676, Atomic Mass: 190.23u190.23\,\text{u}

77
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Iridium

Symbol: IrIr, Atomic Number: 7777, Atomic Mass: 192.22u192.22\,\text{u}

78
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Platinum

Symbol: PtPt, Atomic Number: 7878, Atomic Mass: 195.08u195.08\,\text{u}

79
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Gold

Symbol: AuAu, Atomic Number: 7979, Atomic Mass: 196.97u196.97\,\text{u}

80
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Mercury

Symbol: HgHg, Atomic Number: 8080, Atomic Mass: 200.59u200.59\,\text{u}

81
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Thallium

Symbol: TlTl, Atomic Number: 8181, Atomic Mass: 204.38u204.38\,\text{u}

82
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Lead

Symbol: PbPb, Atomic Number: 8282, Atomic Mass: 207.2u207.2\,\text{u}

83
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Bismuth

Symbol: BiBi, Atomic Number: 8383, Atomic Mass: 208.98u208.98\,\text{u}

84
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Polonium

Symbol: PoPo, Atomic Number: 8484, Atomic Mass: 209u209\,\text{u}

85
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Astatine

Symbol: AtAt, Atomic Number: 8585, Atomic Mass: 210u210\,\text{u}

86
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Radon

Symbol: RnRn, Atomic Number: 8686, Atomic Mass: 222u222\,\text{u}

87
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Francium

Symbol: FrFr, Atomic Number: 8787, Atomic Mass: 223u223\,\text{u}

88
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Radium

Symbol: RaRa, Atomic Number: 8888, Atomic Mass: 226u226\,\text{u}

89
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Actinium

Symbol: AcAc, Atomic Number: 8989, Atomic Mass: 227u227\,\text{u}

90
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Thorium

Symbol: ThTh, Atomic Number: 9090, Atomic Mass: 232.04u232.04\,\text{u}

91
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Protactinium

Symbol: PaPa, Atomic Number: 9191, Atomic Mass: 231.04u231.04\,\text{u}

92
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Uranium

Symbol: UU, Atomic Number: 9292, Atomic Mass: 238.03u238.03\,\text{u}

93
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Neptunium

Symbol: NpNp, Atomic Number: 9393, Atomic Mass: 237u237\,\text{u}

94
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Plutonium

Symbol: PuPu, Atomic Number: 9494, Atomic Mass: 244u244\,\text{u}

95
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Americium

Symbol: AmAm, Atomic Number: 9595, Atomic Mass: 243u243\,\text{u}

96
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Curium

Symbol: CmCm, Atomic Number: 9696, Atomic Mass: 247u247\,\text{u}

97
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Berkelium

Symbol: BkBk, Atomic Number: 9797, Atomic Mass: 247u247\,\text{u}

98
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Californium

Symbol: CfCf, Atomic Number: 9898, Atomic Mass: 251u251\,\text{u}

99
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Einsteinium

Symbol: EsEs, Atomic Number: 9999, Atomic Mass: 252u252\,\text{u}

100
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Fermium

Symbol: FmFm, Atomic Number: 100100, Atomic Mass: 257u257\,\text{u}