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
1 Hydrogen H 1.007 2.2 13.59844 25 120 38 1
2 Helium He 4.002602(2) no data 24.58741 31 140 32 2
3 Lithium Li 6.941(2) 0.98 5.39172 145 182 134 1
4 Beryllium Be 9.012182(3) 1.57 9.3227 105 no data 90 2
5 Boron B 10.811(7) 2.04 8.29803 85 no data 82 3
6 Carbon C 12.0107(8) 2.55 11.2603 70 170 77 4
7 Nitrogen N 14.0067(2) 3.04 14.53414 65 155 75 5
8 Oxygen O 15.9994(3) 3.44 13.61806 60 152 73 6
9 Fluorine F 18.9984032(5) 3.98 17.42282 50 147 71 7
10 Neon Ne 20.1797(6) no data 21.5646 38 154 69 8
11 Sodium Na 22.98976928(2) 0.93 5.13908 180 227 154 1
12 Magnesium Mg 24.3050(6) 1.31 7.64624 150 173 130 2
13 Aluminium Al 26.9815386(8) 1.61 5.98577 125 no data 118 3
14 Silicon Si 28.0855(3) 1.9 8.15169 110 210 111 4
15 Phosphorus P 30.973762(2) 2.19 10.48669 100 180 106 5
16 Sulfur S 32.065(5) 2.58 10.36001 100 180 102 6
17 Chlorine Cl 35.453(2) 3.16 12.96764 100 175 99 7
18 Argon Ar 39.948(1) no data 15.75962 71 188 97 8
19 Potassium K 39.0983(1) 0.82 4.34066 220 275 196 1
20 Calcium Ca 40.078(4) 1 6.11316 180 no data 174 2
21 Scandium Sc 44.955912(6) 1.36 6.5615 160 no data 144 2
22 Titanium Ti 47.867(1) 1.54 6.8281 140 no data 136 2
23 Vanadium V 50.9415(1) 1.63 6.7462 135 no data 125 2
24 Chromium Cr 51.9961(6) 1.66 6.7665 140 no data 127 1
25 Manganese Mn 54.938045(5) 1.55 7.43402 140 no data 139 2
26 Iron Fe 55.845(2) 1.83 7.9024 140 no data 125 2
27 Cobalt Co 58.933195(5) 1.91 7.6398 135 163 121 2
28 Nickel Ni 58.6934(4) 1.88 7.881 135 no data 126 2
29 Copper Cu 63.546(3) 1.9 7.72638 135 140 138 1
30 Zinc Zn 65.38(2) 1.65 9.3942 135 139 131 2
31 Gallium Ga 69.723(1) 1.81 5.9993 130 187 126 3
32 Germanium Ge 72.63(1) 2.01 7.8994 125 no data 122 4
33 Arsenic As 74.92160(2) 2.18 9.7886 115 185 119 5
34 Selenium Se 78.96(3) 2.55 9.75238 115 190 116 6
35 Bromine Br 79.904(1) 2.96 11.81381 115 185 114 7
36 Krypton Kr 83.798(2) 3 13.99961 88 202 110 8
37 Rubidium Rb 85.4678(3) 0.82 4.17713 235 no data 211 1
38 Strontium Sr 87.62(1) 0.95 5.6949 200 no data 192 2
39 Yttrium Y 88.90585(2) 1.22 6.2171 180 no data 162 2
40 Zirconium Zr 91.224(2) 1.33 6.6339 155 no data 148 2
41 Niobium Nb 92.90638(2) 1.6 6.75885 145 no data 137 1
42 Molybdenum Mo 95.96(2) 2.16 7.09243 145 no data 145 1
43 Technetium Tc [98] 1.9 7.28 135 no data 156 1
44 Ruthenium Ru 101.07(2) 2.2 7.3605 130 no data 126 1
45 Rhodium Rh 102.90550(2) 2.28 7.4589 135 no data 135 1
46 Palladium Pd 106.42(1) 2.2 8.3369 140 163 131
47 Silver Ag 107.8682(2) 1.93 7.5762 160 172 153 1
48 Cadmium Cd 112.411(8) 1.69 8.9938 155 158 148 2
49 Indium In 114.818(3) 1.78 5.78636 155 193 144 3
50 Tin Sn 118.710(7) 1.96 7.3439 145 217 141 4
51 Antimony Sb 121.760(1) 2.05 8.6084 145 no data 138 5
52 Tellurium Te 127.60(3) 2.1 9.0096 140 206 135 6
53 Iodine I 126.90447(3) 2.66 10.45126 140 198 133 7
54 Xenon Xe 131.293(6) 2.6 12.1298 108 216 130 8
55 Caesium Cs 132.9054519(2) 0.79 3.8939 260 no data 225 1
56 Barium Ba 137.327(7) 0.89 5.2117 215 no data 198 2
57 Lanthanum La 138.90547(7) 1.1 5.5769 195 no data 169 2
58 Cerium Ce 140.116(1) 1.12 5.5387 185 no data no data 2
59 Praseodymium Pr 140.90765(2) 1.13 5.473 185 no data no data 2
60 Neodymium Nd 144.242(3) 1.14 5.525 185 no data no data 2
61 Promethium Pm [145] no data 5.582 185 no data no data 2
62 Samarium Sm 150.36(2) 1.17 5.6436 185 no data no data 2
63 Europium Eu 151.964(1) no data 5.6704 185 no data no data 2
64 Gadolinium Gd 157.25(3) 1.2 6.1501 180 no data no data 2
65 Terbium Tb 158.92535(2) no data 5.8638 175 no data no data 2
66 Dysprosium Dy 162.500(1) 1.22 5.9389 175 no data no data 2
67 Holmium Ho 164.93032(2) 1.23 6.0215 175 no data no data 2
68 Erbium Er 167.259(3) 1.24 6.1077 175 no data no data 2
69 Thulium Tm 168.93421(2) 1.25 6.18431 175 no data no data 2
70 Ytterbium Yb 173.054(5) no data 6.25416 175 no data no data 2
71 Lutetium Lu 174.9668(1) 1.27 5.4259 175 no data 160 2
72 Hafnium Hf 178.49(2) 1.3 6.82507 155 no data 150 2
73 Tantalum Ta 180.94788(2) 1.5 7.5496 145 no data 138 2
74 Tungsten W 183.84(1) 2.36 7.864 135 no data 146 2
75 Rhenium Re 186.207(1) 1.9 7.8335 135 no data 159 2
76 Osmium Os 190.23(3) 2.2 8.4382 130 no data 128 2
77 Iridium Ir 192.217(3) 2.2 8.967 135 no data 137 2
78 Platinum Pt 195.084(9) 2.28 8.9587 135 175 128 1
79 Gold Au 196.966569(4) 2.54 9.2255 135 166 144 1
80 Mercury Hg 200.59(2) 2 10.4375 150 155 149 2
81 Thallium Tl 204.3833(2) 1.62 6.1082 190 196 148 3
82 Lead Pb 207.2(1) 2.33 7.41666 180 202 147 4
83 Bismuth Bi 208.98040(1) 2.02 7.2856 160 no data 146 5
84 Polonium Po [209] 2 8.417 190 no data no data 6
85 Astatine At [210] 2.2 no data no data no data 7
86 Radon Rn [222] no data 10.7485 120 no data 145 8
87 Francium Fr [223] 0.7 4.0727 no data no data no data 1
88 Radium Ra [226] 0.9 5.2784 215 no data no data 2
89 Actinium Ac [227] 1.1 5.17 195 no data no data 2
90 Thorium Th 232.03806(2) 1.3 6.3067 180 no data no data 2
91 Protactinium Pa 231.03588(2) 1.5 5.89 180 no data no data 2
92 Uranium U 238.02891(3) 1.38 6.19405 175 186 no data 2
93 Neptunium Np [237] 1.36 6.2657 175 no data no data 2
94 Plutonium Pu [244] 1.28 6.0262 175 no data no data 2
95 Americium Am [243] 1.3 5.9738 175 no data no data 2
96 Curium Cm [247] 1.3 5.9915 2
97 Berkelium Bk [247] 1.3 6.1979 2
98 Californium Cf [251] 1.3 6.2817 2
99 Einsteinium Es [252] 1.3 6.42 2
100 Fermium Fm [257] 1.3 6.5 2
101 Mendelevium Md [258] 1.3 6.58 2
102 Nobelium No [259] 1.3 6.65 2
103 Lawrencium Lr [266] 1.3 4.9 3
104 Rutherfordium Rf [267] 6
105 Dubnium Db [268]
106 Seaborgium Sg [269]
107 Bohrium Bh [270]
108 Hassium Hs [277]
109 Meitnerium Mt [278]
110 Darmstadtium Ds [281]
111 Roentgenium Rg [282]
112 Copernicium Cn [285]
113 Nihonium Nh [286]
114 Flerovium Fl [289]
115 Moscovium Mc [290]
116 Livermorium Lv [293]
117 Tennessine Ts [294]
118 Oganesson Og [294]

Important point

  • a few atomic radii are calculated, not experimental
Periodic trends

Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.

Periodic trends arise from the changes in the atomic structure of the chemical elements within their respective periods (horizontal rows) and groups in the periodic table. These law enable the chemical elements to be organized in the periodic table based on their atomic structures and properties. Due to the periodic trends the unknown properties of any element can be partially know.

Some exceptions to these trends exist, such as that of ionization energy in groups 3 and 6.

Periodic table forms
Sets of elements
Elements
History
See also

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