ABCDEFGHIJKLMNOPQRSTUVWXY
1
ZNameSymbolAverage
atomic mas
s
Electronegativity
(Pauling
)
First Ionization
Energy (eV)
AtomicVan der WaalsCovalentValence electronsAverage atomic mass cleaned
2
1.00HydrogenH1.012.213.6025.00120.0038.001.001.01no
3
2.00HeliumHe4.002602(2)24.5931.00140.0032.002.004.00no
4
3.00LithiumLi6.941(2)0.985.39145.00182.00134.001.006.94yes
5
4.00BerylliumBe9.012182(3)1.57484,922.00105.0090.002.009.01yes
6
5.00BoronB10.811(7)2.048.3085.0082.003.0010.81yes
7
6.00CarbonC12.0107(8)2.55257,071.0070.00170.0077.004.0012.01no
8
7.00NitrogenN14.0067(2)3.0414.5365.00155.0075.005.0014.01no
9
8.00OxygenO15.9994(3)3.4413.6260.00152.0073.006.0016.00no
10
9.00FluorineF18.9984032(5)3.9817.4250.00147.0071.007.0019.00no
11
10.00NeonNe20.1797(6)21.5638.00154.0069.008.0020.18no
12
11.00SodiumNa
22.98976928(2)
0.935.14180.00227.00154.001.0022.99yes
13
12.00MagnesiumMg24.3050(6)1.317.65150.00173.00130.002.0024.31yes
14
13.00AluminiumAl26.9815386(8)1.615.99125.00118.003.0026.98yes
15
14.00SiliconSi28.0855(3)1.98.15110.00210.00111.004.0028.09no
16
15.00PhosphorusP30.973762(2)2.1910.49100.00180.00106.005.0030.97no
17
16.00SulfurS32.065(5)2.5810.36100.00180.00102.006.0032.07no
18
17.00ChlorineCl35.453(2)3.1612.97100.00175.0099.007.0035.45yes
19
18.00ArgonAr39.948(1)15.7671.00188.0097.008.0039.95no
20
19.00PotassiumK39.0983(1)0.824.34220.00275.00196.001.0039.10yes
21
20.00CalciumCa40.078(4)16.11180.00174.002.0040.08yes
22
21.00ScandiumSc44.955912(6)1.361,357,029.00160.00144.002.0044.96yes
23
22.00TitaniumTi47.867(1)1.542,330,766.00140.00136.002.0047.87yes
24
23.00VanadiumV50.9415(1)1.632,031,632.00135.00125.002.0050.94yes
25
24.00ChromiumCr51.9961(6)1.662,105,777.00140.00127.001.0052.00yes
26
25.00ManganeseMn54.938045(5)1.557.43140.00139.002.0054.94yes
27
26.00IronFe55.845(2)1.832,602,171.00140.00125.002.0055.85yes
28
27.00CobaltCo58.933195(5)1.911,643,044.00135.00163.00121.002.0058.93yes
29
28.00NickelNi58.6934(4)1.887.88135.00126.002.0058.69yes
30
29.00CopperCu63.546(3)1.97.73135.00140.00138.001.0063.55no
31
30.00ZincZn65.38(2)1.65746,070.00135.00139.00131.002.0065.38yes
32
31.00GalliumGa69.723(1)1.812,956,030.00130.00187.00126.003.0069.72yes
33
32.00GermaniumGe72.63(1)2.012,591,214.00125.00122.004.0072.63yes
34
33.00ArsenicAs74.92160(2)2.182,186,587.00115.00185.00119.005.0074.92no
35
34.00SeleniumSe78.96(3)2.559.75115.00190.00116.006.0078.96no
36
35.00BromineBr79.904(1)2.9611.81115.00185.00114.007.0079.90yes
37
36.00KryptonKr83.798(2)314.0088.00202.00110.008.0083.80no
38
37.00RubidiumRb85.4678(3)0.824.18235.00211.001.0085.47yes
39
38.00StrontiumSr87.62(1)0.951,844,232.00200.00192.002.0087.62yes
40
39.00YttriumY88.90585(2)1.2299,134.00180.00162.002.0088.91yes
41
40.00ZirconiumZr91.224(2)1.331,621,464.00155.00148.002.0091.22yes
42
41.00NiobiumNb92.90638(2)1.66.76145.00137.001.0092.91yes
43
42.00MolybdenumMo95.96(2)2.167.09145.00145.001.0095.96no
44
43.00TechnetiumTc98.001.97.28135.00156.001.0098.00no
45
44.00RutheniumRu101.07(2)2.2622,922.00130.00126.001.00101.07yes
46
45.00RhodiumRh102.90550(2)2.28982,321.00135.00135.001.00102.91no
47
46.00PalladiumPd106.42(1)2.2536,756.00140.00163.00131.00106.42yes
48
47.00SilverAg107.8682(2)1.931,410,750.00160.00172.00153.001.00107.87yes
49
48.00CadmiumCd112.411(8)1.692,936,033.00155.00158.00148.002.00112.41yes
50
49.00IndiumIn114.818(3)1.785.79155.00193.00144.003.00114.82yes
51
50.00TinSn118.710(7)1.96562,291.00145.00217.00141.004.00118.71yes
52
51.00AntimonySb121.760(1)2.051,528,390.00145.00138.005.00121.76yes
53
52.00TelluriumTe127.60(3)2.135,309.00140.00206.00135.006.00127.60yes
54
53.00IodineI126.90447(3)2.6610.45140.00198.00133.007.00126.90yes
55
54.00XenonXe131.293(6)2.6-219,539.00108.00216.00130.008.00131.29no
56
55.00CaesiumCs132.9054519(2)0.792,571,003.00260.00225.001.00132.91yes
57
56.00BariumBa137.327(7)0.8979,380.00215.00198.002.00137.33yes
58
57.00LanthanumLa138.90547(7)1.11,413,246.00195.00169.002.00138.91yes
59
58.00CeriumCe140.116(1)1.121,273,723.00185.002.00140.12no
60
59.00PraseodymiumPr140.90765(2)1.135.47185.002.00140.91no
61
60.00NeodymiumNd144.242(3)1.145.53185.002.00144.24no
62
61.00PromethiumPm145.005.58185.002.00145.00no
63
62.00SamariumSm150.36(2)1.171,656,863.00185.002.00150.36no
64
63.00EuropiumEu151.964(1)1,754,747.00185.002.00151.96no
65
64.00GadoliniumGd157.25(3)1.2-145,579.00180.002.00157.25no
66
65.00TerbiumTb158.92535(2)2,461,126.00175.002.00158.93no
67
66.00DysprosiumDy162.500(1)1.222,735,424.00175.002.00162.50no
68
67.00HolmiumHo164.93032(2)1.23-615,281.00175.002.00164.93no
69
68.00ErbiumEr167.259(3)1.24-300,441.00175.002.00167.26no
70
69.00ThuliumTm168.93421(2)1.256.18175.002.00168.93no
71
70.00YtterbiumYb173.054(5)6.25175.002.00173.05no
72
71.00LutetiumLu174.9668(1)1.27861,729.00175.00160.002.00174.97yes
73
72.00HafniumHf178.49(2)1.36.83155.00150.002.00178.49yes
74
73.00TantalumTa180.94788(2)1.51,313,596.00145.00138.002.00180.95yes
75
74.00TungstenW183.84(1)2.367.86135.00146.002.00183.84no
76
75.00RheniumRe186.207(1)1.92,350,518.00135.00159.002.00186.21no
77
76.00OsmiumOs190.23(3)2.2906,746.00130.00128.002.00190.23yes
78
77.00IridiumIr192.217(3)2.28.97135.00137.002.00192.22no
79
78.00PlatinumPt195.084(9)2.282,807,833.00135.00175.00128.001.00195.08yes
80
79.00GoldAu196.966569(4)2.54129,906.00135.00166.00144.001.00196.97no
81
80.00MercuryHg200.59(2)2904,250.00150.00155.00149.002.00200.59yes
82
81.00ThalliumTl204.3833(2)1.62-298,615.00190.00196.00148.003.00204.38yes
83
82.00LeadPb207.2(1)2.337.42180.00202.00147.004.00207.20yes
84
83.00BismuthBi208.98040(1)2.02349,356.00160.00146.005.00208.98yes
85
84.00PoloniumPo209.0028.42190.006.00209.00no
86
85.00AstatineAt210.002.27.00210.00no
87
86.00RadonRn222.002,040,155.00120.00145.008.00222.00no
88
87.00FranciumFr223.000.7-428,338.001.00223.00no
89
88.00RadiumRa226.000.9322,997.00215.002.00226.00no
90
89.00ActiniumAc227.001.15.17195.002.00227.00no
91
90.00ThoriumTh232.03806(2)1.3426,391.00180.002.00232.04no
92
91.00ProtactiniumPa231.03588(2)1.55.89180.002.00231.04no
93
92.00UraniumU238.02891(3)1.386.19175.00186.002.00238.03no
94
93.00NeptuniumNp237.001.36276,642.00175.002.00237.00no
95
94.00PlutoniumPu244.001.28-598,114.00175.002.00244.00no
96
95.00AmericiumAm243.001.32,862,893.00175.002.00243.00no
97
96.00CuriumCm247.001.32,927,540.002.00247.00no
98
97.00BerkeliumBk247.001.329,007.002.00247.00no
99
98.00CaliforniumCf251.001.3335,081.002.00251.00no
100
99.00EinsteiniumEs252.001.36.422.00252.00no