List of elements by atomic properties

This is a list of chemical elements and their atomic properties, ordered by Atomic number.

Since valence electrons are not clearly defined for the d-block and f-block elements, there not being a clear point at which further ionisation becomes unprofitable, a purely formal definition as number of electrons in the outermost shell has been used.

Table

Z Name Symbol Average
atomic mass
Electronegativity
(Pauling)
First Ionization
Energy (eV)
Radii (pm) Valence
electrons
Atomic Van der Waals Covalent
 
1HydrogenH1.00794(7)2.213.5984425120381
2HeliumHe4.002602(2)no data24.5874131140322
3LithiumLi6.941(2)0.985.391721451821341
4BerylliumBe9.012182(3)1.579.3227105no data902
5BoronB10.811(7)2.048.2980385no data823
6CarbonC12.0107(8)2.5511.260370170774
7NitrogenN14.0067(2)3.0414.5341465155755
8OxygenO15.9994(3)3.4413.6180660152736
9FluorineF18.9984032(5)3.9817.4228250147717
10NeonNe20.10097(6)no data21.564638154698
11SodiumNa22.98976928(2)0.935.139081802271541
12MagnesiumMg24.3050(6)1.317.646241501731302
13AluminiumAl26.9815386(8)1.615.98577125no data1183
14SiliconSi28.0855(3)1.98.151691102101114
15PhosphorusP30.973762(2)2.1910.486691001801065
16SulfurS32.065(5)2.5810.360011001801026
17ChlorineCl35.453(2)3.1612.96764100175997
18ArgonAr39.948(1)no data15.7596271188978
19PotassiumK39.0983(1)0.824.340662202751961
20CalciumCa40.078(4)16.11316180no data1742
21ScandiumSc44.955912(6)1.366.5615160no data1442
22TitaniumTi47.867(1)1.546.8281140no data1362
23VanadiumV50.9415(1)1.636.7462135no data1252
24ChromiumCr51.9961(6)1.666.7665140no data1271
25ManganeseMn54.938045(5)1.557.43402140no data1392
26IronFe55.845(2)1.837.9024140no data1252
27CobaltCo58.933195(5)1.917.63981351631212
28NickelNi58.6934(4)1.887.881135no data1262
29CopperCu63.546(3)1.97.726381351401381
30ZincZn65.38(2)1.659.39421351391312
31GalliumGa69.723(1)1.815.99931301871263
32GermaniumGe72.64(1)2.017.8994125no data1224
33ArsenicAs74.92160(2)2.189.78861151851195
34SeleniumSe78.96(3)2.559.752381151901166
35BromineBr79.904(1)2.9611.813811151851147
36KryptonKr83.798(2)313.99961882021108
37RubidiumRb85.4678(3)0.824.17713235no data2111
38StrontiumSr87.62(1)0.955.6949200no data1922
39YttriumY88.90585(2)1.226.2171180no data1622
40ZirconiumZr91.224(2)1.336.6339155no data1482
41NiobiumNb92.90638(2)1.66.75885145no data1371
42MolybdenumMo95.96(2)2.167.09243145no data1451
43TechnetiumTc[98]1.97.28135no data1561
44RutheniumRu101.07(2)2.27.3605130no data1261
45RhodiumRh102.90550(2)2.287.4589135no data1351
46PalladiumPd106.42(1)2.28.3369140163131
47SilverAg107.8682(2)1.937.57621601721531
48CadmiumCd112.411(8)1.698.99381551581482
49IndiumIn114.818(3)1.785.786361551931443
50TinSn118.710(7)1.967.34391452171414
51AntimonySb121.760(1)2.058.6084145no data1385
52TelluriumTe127.60(3)2.19.00961402061356
53IodineI126.90447(3)2.6610.451261401981337
54XenonXe131.293(6)2.612.12981082161308
55CaesiumCs132.9054519(2)0.793.8939260no data2251
56BariumBa137.327(7)0.895.2117215no data1982
57LanthanumLa138.90547(7)1.15.5769195no data1692
58CeriumCe140.116(1)1.125.5387185no datano data2
59PraseodymiumPr140.90765(2)1.135.473185no datano data2
60NeodymiumNd144.242(3)1.145.525185no datano data2
61PromethiumPm[145]no data5.582185no datano data2
62SamariumSm150.36(2)1.175.6436185no datano data2
63EuropiumEu151.964(1)no data5.6704185no datano data2
64GadoliniumGd157.25(3)1.26.1501180no datano data2
65TerbiumTb158.92535(2)no data5.8638175no datano data2
66DysprosiumDy162.500(1)1.225.9389175no datano data2
67HolmiumHo164.93032(2)1.236.0215175no datano data2
68ErbiumEr167.259(3)1.246.1077175no datano data2
69ThuliumTm168.93421(2)1.256.18431175no datano data2
70YtterbiumYb173.054(5)no data6.25416175no datano data2
71LutetiumLu174.9668(1)1.275.4259175no data1602
72HafniumHf178.49(2)1.36.82507155no data1502
73TantalumTa180.94788(2)1.57.5496145no data1382
74TungstenW183.84(1)2.367.864135no data1462
75RheniumRe186.207(1)1.97.8335135no data1592
76OsmiumOs190.23(3)2.28.4382130no data1282
77IridiumIr192.217(3)2.28.967135no data1372
78PlatinumPt195.084(9)2.288.95871351751281
79GoldAu196.966569(4)2.549.22551351661441
80MercuryHg200.59(2)210.43751501551492
81ThalliumTl204.3833(2)1.626.10821901961483
82LeadPb207.2(1)2.337.416661802021474
83BismuthBi208.98040(1)2.027.2856160no data1465
84PoloniumPo[209]28.417190no datano data6
85AstatineAt[210]2.2no datano datano data7
86RadonRn[222]no data10.7485120no data1458
87FranciumFr[223]0.74.0727no datano datano data1
88RadiumRa[226]0.95.2784215no datano data2
89ActiniumAc[227]1.15.17195no datano data2
90ThoriumTh232.03806(2)1.36.3067180no datano data2
91ProtactiniumPa231.03588(2)1.55.89180no datano data2
92UraniumU238.02891(3)1.386.19405175186no data2
93NeptuniumNp[237]1.366.2657175no datano data2
94PlutoniumPu[244]1.286.0262175no datano data2
95AmericiumAm[243]1.35.9738175no datano data2
96CuriumCm[247]1.35.99152
97BerkeliumBk[247]1.36.19792
98CaliforniumCf[251]1.36.28172
99EinsteiniumEs[252]1.36.422
100FermiumFm[257]1.36.52
101MendeleviumMd[258]1.36.582
102NobeliumNo[259]1.36.652
103LawrenciumLr[266]1.34.93
104RutherfordiumRf[267]6
105DubniumDb[268]
106SeaborgiumSg[269]
107BohriumBh[270]
108HassiumHs[277]
109MeitneriumMt[278]
110DarmstadtiumDs[281]
111RoentgeniumRg[282]
112CoperniciumCn[285]
113NihoniumNh[286]
114FleroviumFl[289]
115MoscoviumMc[290]
116LivermoriumLv[293]
117TennessineTs[294]
118OganessonOg[294]

Notes

  • a few atomic radii are calculated, not experimental
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