Update 3 Mar 2022
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Move your mouse over the symbol to get the name and valence of the element
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | ||
| Group | I | II | IIIb | IVb | Vb | VIb | VIIb | VIIIb | Ib | IIb | III | IV | V | VI | VII | VIII | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | |||||||||||||||||||
| 1 | 1 H 1.008 |
2 He 4.002 | |||||||||||||||||
| 2 | 4 Be 9.01 |
6 C 12.01 |
7 N 14.01 |
8 O 16.00 |
10 Ne 20.17 | ||||||||||||||
| 3 | 11 Na 22.99 |
15 P 30.97 |
16 S 32.06 |
17 Cl 35.45 |
18 Ar 39.95 | ||||||||||||||
| 4 | 19 K 39.10 |
21 Sc 44.96 |
22 Ti 47.90 |
27 Co 58.93 |
31 Ga 69.72 |
32 Ge 72.59 |
35 Br 79.9 |
36 Kr 83.8 | |||||||||||
| 5 | 37 Rb 85.5 |
39 Y 88.9 |
40 Zr 91.2 |
41 Nb 92.9 |
42 Mo 95.9 |
43 Tc 98.9 |
44 Ru 101.1 |
45 Rh 102.9 |
46 Pd 106.4 |
49 In 114.8 |
50 Sn 118.7 |
52 Te 127.6 |
54 Xe 131.3 | ||||||
| 6 | 57 a) La 138.9 |
72 Hf 178.5 |
73 Ta 180.9 |
74 W 183.8 |
75 Re 186.2 |
76 Os 190.2 |
77 Ir 192.2 |
81 Tl 204.4 |
83 Bi 209.0 |
84 Po 209 |
85 At 210 |
86 Rn 222 | |||||||
| 7 | 87 Fr 223 |
89 b) Ac 227 |
104 Rf 261 |
105 Db 262 |
106 Sg 266 |
107 Bh 264 |
108 Hs 269 |
109 Mt 268 |
110 Ds 271 |
111 Rg 272 |
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| a) Lanthanides | 58 Ce 140.1 |
59 Pr 140.9 |
60 Nd 144.2 |
61 Pm 145 |
62 Sm 150.4 |
63 Eu 152.0 |
64 Gd 157.2 |
65 Tb 158.9 |
66 Dy 162.5 |
67 Ho 164.9 |
68 Er 167.3 |
69 Tm 168.9 |
70 Yb 173.0 |
71 Lu 175.0 |
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| b) Actinides | 90 Th 232 |
91 Pa 231 |
93 Np 237 |
94 Pu 244 |
95 Am 243 |
96 Cm 247 |
97 Bk 247 |
98 Cf 251 |
99 Es 254 |
100 Fm 257 |
101 Md 258 |
102 No 259 |
103 Lr 260 |
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| Keys to the table | 1 H 1.008 |
Atomic number Symbol of element Atomic mass |
Metals (black) |
Semi-metals (blue) |
Non-metals (grey) |
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| 00 AA 00.00 |
Alkaline metals |
The most common valence is shown after the name of the element in square brackets [n] when you move your mouse over the symbol If the cell background changes some IX information is available: Dark grey: a few lines of explanation (click the cell) |
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| 00 EE 00.00 |
Earth-alkalis |
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| 00 TT 00.00 |
Transition metals |
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| 00 MM 00.00 |
Other metals |
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| 00 XX 00.00 |
Halogens |
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| 00 OO 00.00 |
Noble gases |
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See the selectivity scale for cation and anion exchange resins.
See the chemical compounds frequently seen in ion exchange applications, with their formula and name in five languages.
See also (external link) WebElements, the periodic table on the WWW. It has all details on each element, including a description, electronic configuration, isotopes, and most common compounds.
