Periodic Table of Elements

Atomic NoNameSymbolAtomic

Weight
Fire

Frequency
M.P.

(°C)
B.P.

(°C)
Density

(g/cm3)
Electron

configuration
Ionization

energy (eV)
Electronegativity ValenceDescription

Hardness
GroupEarth

crust (%)
Discovery

Year
001HydrogenH1.0079
-259.0-253.00.08991s113.59842.2 1, 0, -1 gas 10.141776
002HeliumHe4.0026
-272.0-269.0 0.1785 1s224.5874?
0 noble gas 18
1895
003LithiumLi6.941
180.01,347.000.53[He] 2s15.39170.98 1,-1 0.6
1
1817
004BerylliumBe9.0122
1,278.002,970.001.85[He] 2s29.32271.57 2 5.5
2
1797
005BoronB10.811
2,300.002,550.002.34[He] 2s2 2p18.2982.04 3,2,1 9.3
13
1808
006 Carbon C 12.0107
3,500.00 4,827.00 2.26 [He] 2s2 2p2 11.2603 2.55 4,3,2,1,-1,-2,-4 10.0 (diamond) & 1-2 (graphite) 14 0.09 1694 ~
007NitrogenN14.0067
-210.0-196.01.25[He] 2s2 2p314.53413.04 5,4,3,2,1,0,-1,-2,-3 gas 15
1772
008OxygenO15.9994
-218.0-183.01.43[He] 2s2 2p413.61813.44 2,1,0,-1,-2 gas 1646.711774
009FluorineF18.9984
-220.0-188.01.7[He] 2s2 2p517.42283.98 0,-1 halogen gas 170.031886
010NeonNe20.1797
-249.0-246.00.9[He] 2s2 2p621.5645?
0 noble gas 18
1898
011SodiumNa22.9897
98.0883.00.97[Ne] 3s15.13910.93 1, -1 0.5
12.751807
012MagnesiumMg24.305
639.01,090.001.74[Ne] 3s27.64621.31 2 2.5
22.081755
013AluminumAl26.9815
660.02,467.002.7[Ne] 3s2 3p15.98581.61 3, 1
2.75
138.071825
014SiliconSi28.0855
1,410.002,355.002.33[Ne] 3s2 3p28.15171.90 4,3,2,1, -1,-2,-4
6.5 metalloid
1427.691824
015PhosphorusP30.9738
44.0280.01.82[Ne] 3s2 3p310.48672.19 5, 4, 3, 2, 1, 0, -1, -2, -3
nonmetal 150.131669
016 Sulfur S 32.065
113.0 445.0 2.07 [Ne] 3s2 3p410.362.58 6,5,4,3,2,1, 0, -1,-2
2.0
16 0.05 500 BC
017ChlorineCl35.453
-101.0-35.03.21[Ne] 3s2 3p512.96763.16 6,5,4,3,2,1, 0,-1,-2
halogen gas
170.051774
018ArgonAr39.948
-189.0-186.01.78[Ne] 3s2 3p615.7596?
0
noble gas
18
1894
019PotassiumK39.0983
64.0774.00.86[Ar] 4s14.34070.82 1, -1
0.4
12.581807
020CalciumCa40.078
839.01,484.001.55[Ar] 4s26.11321.00 2
1.75
23.651808
021ScandiumSc44.9559
1,539.002,832.002.99[Ar] 3d1 4s26.56151.36 3,2,1
transition metal
3
1879
022TitaniumTi47.867
1,660.003,287.004.54[Ar] 3d2 4s26.82811.54 4,3,2,0, -1,-2
6.0
40.621791
023VanadiumV50.9415
1,890.003,380.006.11[Ar] 3d3 4s26.74621.63 5,4,3,2,1,0,-1, -2
7.0
5
1830
024ChromiumCr51.9961
1,857.002,672.007.19[Ar] 3d5 4s16.76651.66 6,5,4,3,2,1,0,-1, -2,-3,-4
8.5
60.041797
025ManganeseMn54.938
1,245.001,962.007.43[Ar] 3d5 4s27.4341.55 7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3
6.0
70.091774
026 Iron Fe 55.845
1,535.00 2,750.00 7.87 [Ar] 3d6 4s27.90241.83 6,5,4,3,2,1,0,-1,-2
metal
8 5.05 2000 BC
027CobaltCo58.9332
1,495.002,870.008.9[Ar] 3d7 4s27.8811.88 5, 4, 3, 2, 1, 0, -1

9
1735
028NickelNi58.6934
1,453.002,732.008.9[Ar] 3d8 4s27.63981.91 6, 4, 3, 2, 1, 0, -1

100.021751
029 Copper Cu 63.546
1,083.00 2,567.00 8.96 [Ar] 3d10 4s1 7.7264 1.90 4,3,2, 1,0

11
8000 BC
030ZincZn65.39
420.0907.07.13[Ar] 3d10 4s29.39421.65 2, 1, 0
2.5
12
1500<
031GalliumGa69.723
30.02,403.005.91[Ar] 3d10 4s2 4p15.99931.81 3, 2, 1
1.5
13
1875
032GermaniumGe72.64
937.02,830.005.32[Ar] 3d10 4s2 4p27.89942.014, 3, 2, 1
6.0
14
1886
033 Arsenic As 74.9216
81.0 613.0 5.72 [Ar] 3d10 4s2 4p3 9.7886 2.18 5, 3, 2, -3 3.5
15
1250
034SeleniumSe78.96
217.0685.04.79[Ar] 3d10 4s2 4p49.75242.55 6, 4, 2, 1, -2 2.0
16
1817
035BromineBr79.904
-7.059.03.12[Ar] 3d10 4s2 4p511.81382.96 7,5,4,3,1,0,-1
halogen
17
1826
036KryptonKr83.8
-157.0-153.03.75[Ar] 3d10 4s2 4p613.99963.00 2, 0
noble gas
18
1898
037RubidiumRb85.4678
39.0688.01.63[Kr] 5s14.17710.82 1, -1
0.3
1
1861
038StrontiumSr87.62
769.01,384.002.54[Kr] 5s25.69490.95 2
1.5
2
1790
039YttriumY88.9059
1,523.003,337.004.47[Kr] 4d1 5s26.21731.22 3, 2
transition metal
3
1794
040ZirconiumZr91.224
1,852.004,377.006.51[Kr] 4d2 5s26.63391.33 4,3,2,1,0,-2
5.0
40.031789
041NiobiumNb92.9064
2,468.004,927.008.57[Kr] 4d4 5s16.75891.6 5,4,3,2,1, 0,-1,-3

5
1801
042MolybdenumMo95.94
2,617.004,612.0010.22[Kr] 4d5 5s17.09242.16 6,5,4,3,2,1, 0,-1,-2

6
1781
043TechnetiumTc98.0
2,200.004,877.0011.5[Kr] 4d5 5s27.281.9 7,6,5,4,3,2,1, 0,-1,-3

7
1937
044RutheniumRu101.07
2,250.003,900.0012.37[Kr] 4d7 5s17.36052.2 8,7,6,5,4,3,2,1, 0,-2

8
1844
045RhodiumRh102.9055
1,966.003,727.0012.41[Kr] 4d8 5s17.45892.28 6,5,4,3,2,1, 0,-1

9
1803
046PalladiumPd106.42
1,552.002,927.0012.02[Kr] 4d108.33692.20 4, 2, 0

10
1803
047 Silver Ag 107.8682
962.0 2,212.00 10.5 [Kr] 4d10 5s1 7.5762 1.93 3, 2, 1, 0

11
3000 BC
048CadmiumCd112.411
321.0765.08.65[Kr] 4d10 5s28.99381.69 2, 1

12
1817
049IndiumIn114.818
157.02,000.007.31[Kr] 4d10 5s2 5p15.78641.78 3, 2, 1
soft metal
13
1863
050 Tin Sn 118.71
232.0 2,270.00 7.31 [Kr] 4d10 5s2 5p2 7.3439 1.96 4, 2, -4
1.5 soft metal
14
3000 BC
051 Antimony Sb 121.76
630.0 1,750.00 6.68 [Kr] 4d10 5s2 5p3 8.6084 2.05 5, 3, -3
3.0
15
3000 BC
052TelluriumTe127.6
449.0990.06.24[Kr] 4d10 5s2 5p49.00962.1 6,5,4,2,1,-2
2.25
16
1783
053IodineI126.9045
114.0184.04.93[Kr] 4d10 5s2 5p510.45132.66 7,5,3,1, 0,-1
halogen solid to purple-pink gas
17
1811
054XenonXe131.293
-112.0-108.05.9[Kr] 4d10 5s2 5p612.12982.6 8,6,4,3,2,0
noble gas
18
1898
055CesiumCs132.9055
29.0678.01.87[Xe] 6s13.89390.79 1, -1
0.2
1
1860
056BariumBa137.327
725.01,140.003.59[Xe] 6s25.21170.89 2
1.25
20.051808
057LanthanumLa138.9055
920.03,469.006.15[Xe] 5d1 6s25.57691.10 3, 2
2.5
3
1839
058CeriumCe140.116
795.03,257.006.77[Xe] 4f1 5d1 6s25.53871.12 4, 3, 2
2.5
101
1803
059PraseodymiumPr140.9077
935.03,127.006.77[Xe] 4f3 6s25.4731.13 4, 3, 2
soft
101
1885
060NeodymiumNd144.24
1,010.003,127.007.01[Xe] 4f4 6s25.5251.14 4, 3, 2

101
1885
061PromethiumPm145.0
1,100.003,000.007.3[Xe] 4f5 6s25.5821.13 3

101
1945
062SamariumSm150.36
1,072.001,900.007.52[Xe] 4f6 6s25.64371.17 3, 2

101
1879
063EuropiumEu151.964
822.01,597.005.24[Xe] 4f7 6s25.67041.2 3, 2
lanthanide
101
1901
064GadoliniumGd157.25
1,311.003,233.007.9[Xe] 4f7 5d1 6s26.15011.2 3, 2, 1

101
1880
065TerbiumTb158.9253
1,360.003,041.008.23[Xe] 4f9 6s25.86381.22 4, 3, 1

101
1843
066DysprosiumDy162.5
1,412.002,562.008.55[Xe] 4f10 6s25.93891.23 4, 3, 2

101
1886
067HolmiumHo164.9303
1,470.002,720.008.8[Xe] 4f11 6s26.02151.24 3, 2

101
1867
068ErbiumEr167.259
1,522.002,510.009.07[Xe] 4f12 6s26.10771.24 3

101
1842
069ThuliumTm168.9342
1,545.001,727.009.32[Xe] 4f13 6s26.18431.25 3, 2

101
1879
070YtterbiumYb173.04
824.01,466.006.9[Xe] 4f14 6s26.25421.1 3, 2

101
1878
071LutetiumLu174.967
1,656.003,315.009.84[Xe] 4f14 5d1 6s25.42591.27 3

101
1907
072HafniumHf178.49
2,150.005,400.0013.31[Xe] 4f14 5d2 6s26.82511.3 4, 3, 2, 1

4
1923
073TantalumTa180.9479
2,996.005,425.0016.65[Xe] 4f14 5d3 6s27.54961.5 5,4,3,2,1, -1,-3

5
1802
074TungstenW183.84
3,410.005,660.0019.35[Xe] 4f14 5d4 6s27.8642.36 6,5,4,3,2,1, 0,-1,-2,-4

6
1783
075RheniumRe186.207
3,180.005,627.0021.04[Xe] 4f14 5d5 6s27.83351.9 7,6,5,4,3,2,1, 0,-1,-3

7
1925
076OsmiumOs190.23
3,045.005,027.0022.6[Xe] 4f14 5d6 6s28.43822.2 8,7,6,5,4,3,2,1, 0,-2

8
1803
077IridiumIr192.217
2,410.004,527.0022.4[Xe] 4f14 5d7 6s28.9672.2 6,5,4,3,2,1, 0,-1
silvery-white
9
1803
078PlatinumPt195.078
1,772.003,827.0021.45[Xe] 4f14 5d9 6s18.95872.28 6, 5, 4, 2, 0

10
1735
079 Gold Au 196.9665
1,064.00 2,807.00 19.32 [Xe] 4f14 5d10 6s1 9.2255 2.54 7,5,3,2,1, 0,-1

11
2500 BC
080 Mercury Hg 200.59
-39.0 357.0 13.55 [Xe] 4f14 5d10 6s2 10.4375 2.00 2, 1
12
1500 BC
081ThalliumTl204.3833
303.01,457.0011.85[Xe] 4f14 5d10 6s2 6p16.10821.62 3, 1

13
1861
082 Lead Pb 207.2
327.0 1,740.00 11.35 [Xe] 4f14 5d10 6s2 6p2 7.4167 2.33 4, 2

14
4000 BC
083 Bismuth Bi 208.9804
271.0 1,560.00 9.75 [Xe] 4f14 5d10 6s2 6p3 7.2856 2.02 5,3,1,-3

15
1400>
084PoloniumPo209.0
254.0962.09.3[Xe] 4f14 5d10 6s2 6p48.4172.0 6, 4, 2, -2

16
1898
085AstatineAt210.0
302.0337.0
[Xe] 4f14 5d10 6s2 6p59.32.2 7, 5, 3, 1, -1

17
1940
086RadonRn222.0
-71.0-62.09.73[Xe] 4f14 5d10 6s2 6p610.7485?
2, 0
noble gas
18
1900
087FranciumFr223.0
27.0677.0
[Rn] 7s14.07270.7 1
radioactive alkali metal
1
1939
088RadiumRa226.0
700.01,737.005.5[Rn] 7s25.27840.89 2

2
1898
089ActiniumAc227.0
1,050.003,200.0010.07[Rn] 6d1 7s25.171.1 3

3
1899
090ThoriumTh232.0381
1,750.004,790.0011.72[Rn] 6d2 7s26.30671.3 4, 3, 2

102
1829
091ProtactiniumPa231.0359
1,568.00
15.4[Rn] 5f2 6d1 7s25.891.5 5, 4, 3

102
1913
092UraniumU238.0289
1,132.003,818.0018.95[Rn] 5f3 6d1 7s26.19411.38 6, 5, 4, 3, 2

102
1789
093NeptuniumNp237.0
640.03,902.0020.2[Rn] 5f4 6d1 7s26.26571.36 7, 6, 5, 4, 3, 2

102
1940
094PlutoniumPu244.0
640.03,235.0019.84[Rn] 5f6 7s26.02621.28 7, 6, 5, 4, 3, 2

102
1940
095AmericiumAm243.0
994.02,607.0013.67[Rn] 5f7 7s25.97381.3 7, 6, 5, 4, 3, 2

102
1944
096CuriumCm247.0
1,340.00
13.5 [Rn]5f76d17s25.99151.3 6, 5, 4, 3, 2

102
1944
097BerkeliumBk247.0
986.0
14.78 [Rn]5f97s26.19791.3 4, 3, 2

102
1949
098CaliforniumCf251.0
900.0
15.1 [Rn]5f107s26.28171.3 5, 4, 3, 2

102
1950
099EinsteiniumEs252.0
860.0
13.5 (?) [Rn]5f117s26.421.3 4, 3, 2

102
1952
100FermiumFm257.0
1,527.00
Unknown [Rn]5f127s26.51.3 4, 3, 2
102
1952
101MendeleviumMd258.0


Unknown [Rn]5f137s26.581.3 3, 2, 1

102
1955
102NobeliumNo259.0
827.0
Unknown [Rn]5f147s26.651.3 3, 2

102
1958
103LawrenciumLr262.0
1,627.00
9.84 > [Rn]5f147s27p14.9?
3, 2

102
1961
104RutherfordiumRf261.0


18.1 [Rn]5f146d27s2
?
4, 3

4
1964
105DubniumDb262.0


39 (?) *[Rn]5f146d27s2 (!Verified)
?
5, 4

5
1967
106SeaborgiumSg266.0


35 (?) *[Rn]5f146d47s2
?
6, 5, 4

6
1974
107BohriumBh264.0


37 (?) *[Rn]5f146d57s2
?
7, 6, 5, 4, 3

7
1981
108HassiumHs277.0


41 (?) *[Rn]5f146d67s2
?
8, 7, 4, 3, 2

8
1984
109MeitneriumMt268.0


35 (?) *[Rn]5f146d77s2
?
6, 5, 4, 3, 2, 1

9
1982
110 Darmstadtium Ds 271


21.46 > *[Rn]5f146d97s1
?
6, 5, 4, 3, 2, 1

10

1961
111 Roentgenium Rg 272


28.7 *[Rn]5f146d107s1
?
3,-1

11

1969
112 Copernicium Cn 285


23.7 *[Rn]5f146d107s2
?
2, 1

12

1970
113 Nihonium Nh 284
700 1400 16 *[Rn]5f146d107s27p1
?
1

13

1974
114 Flerovium Fl 289
340 420 14 *[Rn]5f146d107s27p2
?
2

14

1975
115 Moscovium Mc 288
13.5 700 13.5 *[Rn]5f146d107s27p3
?
3, 1

15

1982
116 Livermorium Lv 292
12.9 709 12.9 *[Rn]5f146d107s27p4
?
4, 2

16

1984
117 Tennessine Ts 294
7.2 723 7.2 *[Rn]5f146d107s27p5
?
?

17

1994
118 Oganesson Og 294
5.0 258 5.0 *[Rn]5f146d107s27p6
?
8, 6, 4, 2

18

1994