ABCDEFGHIJKLMNOPQRSTUVWX
1
ZNameSymbolAverage
atomic mas
s
Electronegativity
(Pauling)
First Ionization
Energ
y(eV)
Radii (pm) AtomicRadii (pm)Van der WaalsRadii (pm)CovalentValence
electrons
2
1HydrogenH1.0072.213.59844251203813.980
3
2HeliumHe4.00260224.58741311403220
4
3LithiumLi6.9410.985.3917214518213411
5
4BerylliumBe9.0121821.579.32271059021
6
5BoronB10.8112.048.29803858231
7
6CarbonC12.01072.5511.2603701707740
8
7NitrogenN14.00673.0414.53414651557550
9
8OxygenO15.99943.4413.61806601527360
10
9FluorineF18.99840323.9817.42282501477170
11
10NeonNe20.179721.5646381546980
12
11SodiumNa22.989769280.935.1390818022715411
13
12MagnesiumMg24.3051.317.6462415017313021
14
13AluminiumAl26.98153861.615.9857712511831
15
14SiliconSi28.08551.98.1516911021011140
16
15PhosphorusP30.9737622.1910.4866910018010650
17
16SulfurS32.0652.5810.3600110018010260
18
17ChlorineCl35.4533.1612.967641001759971
19
18ArgonAr39.94815.75962711889780
20
19PotassiumK39.09830.824.3406622027519611
21
20CalciumCa40.07816.1131618017421
22
21ScandiumSc44.9559121.366.561516014421
23
22TitaniumTi47.8671.546.828114013621
24
23VanadiumV50.94151.636.746213512521
25
24ChromiumCr51.99611.666.766514012711
26
25ManganeseMn54.9380451.557.4340214013921
27
26IronFe55.8451.837.902414012521
28
27CobaltCo58.9331951.917.639813516312121
29
28NickelNi58.69341.887.88113512621
30
29CopperCu63.5461.97.7263813514013810
31
30ZincZn65.381.659.394213513913121
32
31GalliumGa69.7231.815.999313018712631
33
32GermaniumGe72.632.017.899412512241
34
33ArsenicAs74.92162.189.788611518511950
35
34SeleniumSe78.962.559.7523811519011660
36
35BromineBr79.9042.9611.8138111518511471
37
36KryptonKr83.798313.999618820211080
38
37RubidiumRb85.46780.824.1771323521111
39
38StrontiumSr87.620.955.694920019221
40
39YttriumY88.905851.226.217118016221
41
40ZirconiumZr91.2241.336.633915514821
42
41NiobiumNb92.906381.66.7588514513711
43
42MolybdenumMo95.962.167.0924314514510
44
43TechnetiumTc981.97.2813515610
45
44RutheniumRu101.072.27.360513012611
46
45RhodiumRh102.90552.287.458913513510
47
46PalladiumPd106.422.28.33691401631311
48
47SilverAg107.86821.937.576216017215311
49
48CadmiumCd112.4111.698.993815515814821
50
49IndiumIn114.8181.785.7863615519314431
51
50TinSn118.711.967.343914521714141
52
51AntimonySb121.762.058.608414513851
53
52TelluriumTe127.62.19.009614020613561
54
53IodineI126.904472.6610.4512614019813371
55
54XenonXe131.2932.612.129810821613080
56
55CaesiumCs132.90545190.793.893926022511
57
56BariumBa137.3270.895.211721519821
58
57LanthanumLa138.905471.15.576919516921
59
58CeriumCe140.1161.125.538718520
60
59PraseodymiumPr140.907651.135.47318520
61
60NeodymiumNd144.2421.145.52518520
62
61PromethiumPm1455.58218520
63
62SamariumSm150.361.175.643618520
64
63EuropiumEu151.9645.670418520
65
64GadoliniumGd157.251.26.150118020
66
65TerbiumTb158.925355.863817520
67
66DysprosiumDy162.51.225.938917520
68
67HolmiumHo164.930321.236.021517520
69
68ErbiumEr167.2591.246.107717520
70
69ThuliumTm168.934211.256.1843117520
71
70YtterbiumYb173.0546.2541617520
72
71LutetiumLu174.96681.275.425917516021
73
72HafniumHf178.491.36.8250715515021
74
73TantalumTa180.947881.57.549614513821
75
74TungstenW183.842.367.86413514620
76
75RheniumRe186.2071.97.833513515920
77
76OsmiumOs190.232.28.438213012821
78
77IridiumIr192.2172.28.96713513720
79
78PlatinumPt195.0842.288.958713517512811
80
79GoldAu196.9665692.549.225513516614410
81
80MercuryHg200.59210.437515015514921
82
81ThalliumTl204.38331.626.108219019614831
83
82LeadPb207.22.337.4166618020214741
84
83BismuthBi208.98042.027.285616014651
85
84PoloniumPo20928.41719060
86
85AstatineAt2102.270
87
86RadonRn22210.748512014580
88
87FranciumFr2230.74.072710
89
88RadiumRa2260.95.278421520
90
89ActiniumAc2271.15.1719520
91
90ThoriumTh232.038061.36.306718020
92
91ProtactiniumPa231.035881.55.8918020
93
92UraniumU238.028911.386.1940517518620
94
93NeptuniumNp2371.366.265717520
95
94PlutoniumPu2441.286.026217520
96
95AmericiumAm2431.35.973817520
97
96CuriumCm2471.35.991520
98
97BerkeliumBk2471.36.197920
99
98CaliforniumCf2511.36.281720
100
99EinsteiniumEs2521.36.4220