| Group | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | |||||||||||||||||||
| 1 | 1 1.008 |
2 4.0026 |
|||||||||||||||||
| 2 | 3 6.94 |
4 9.0122 |
5 10.81 |
6 12.011 |
7 14.007 |
8 15.999 |
9 18.998 |
10 20.180 |
|||||||||||
| 3 | 11 22.990 |
12 24.305 |
13 26.982 |
14 28.085 |
15 30.974 |
16 32.06 |
17 35.45 |
18 39.948 |
|||||||||||
| 4 | 19 39.098 |
20 40.078 |
21 44.956 |
22 47.867 |
23 50.942 |
24 51.996 |
25 54.938 |
26 55.845 |
27 58.933 |
28 58.693 |
29 63.546 |
30 65.38 |
31 69.723 |
32 72.63 |
33 74.922 |
34 78.96 |
35 79.904 |
36 83.798 |
|
| 5 | 37 85.468 |
38 87.62 |
39 88.906 |
40 91.224 |
41 92.906 |
42 95.96 |
43 [97.91] |
44 101.07 |
45 102.91 |
46 106.42 |
47 107.87 |
48 112.41 |
49 114.82 |
50 118.71 |
51 121.76 |
52 127.60 |
53 126.90 |
54 131.29 |
|
| 6 | 55 132.91 |
56 137.33 |
* | 71 174.97 |
72 178.49 |
73 180.95 |
74 183.84 |
75 186.21 |
76 190.23 |
77 192.22 |
78 195.08 |
79 196.97 |
80 200.59 |
81 204.38 |
82 207.2 |
83 208.98 |
84 [208.98] |
85 [209.99] |
86 [222.02] |
| 7 | 87 [223.02] |
88 [226.03] |
** | 103 [262.11] |
104 [265.12] |
105 [268.13] |
106 [271.13] |
107 [270] |
108 [277.15] |
109 [276.15] |
110 [281.16] |
111 [280.16] |
112 [285.17] |
113 [284.18] |
114 [289.19] |
115 [288.19] |
116 [293] |
117 [294] |
118 [294] |
| *Lanthanoids | * | 57 138.91 |
58 140.12 |
59 140.91 |
60 144.24 |
61 [144.91] |
62 150.36 |
63 151.96 |
64 157.25 |
65 158.93 |
66 162.50 |
67 164.93 |
68 167.26 |
69 168.93 |
70 173.05 |
||||
| **Actinoids | ** | 89 [227.03] |
90 232.04 |
91 231.04 |
92 238.03 |
93 [237.05] |
94 [244.06] |
95 [243.06] |
96 [247.07] |
97 [247.07] |
98 [251.08] |
99 [252.08] |
100 [257.10] |
101 [258.10] |
102 [259.10] |
||||
The periodic table is a table of the chemical elements in which the elements are arranged by order of atomic number in such a way that the periodic properties (chemical periodicity) of the elements are made clear. The standard form of the table includes periods (usually horizontal in the periodic table) and groups (usually vertical). Elements in groups have some similar properties to each other. There is no one single or best structure for the periodic table but by whatever consensus there is, the form used here is very useful. The periodic table is a masterpiece of organised chemical information. The evolution of chemistry's periodic table into the current form is an astonishing achievement with major contributions from many famous chemists and other eminent scientists.
Latest news
On 10 September 2013 a paper published in Phys. Rev. Lett by D. Rudolph and others outlines additional evidence for the claims that fusion-evaporation reactions between 48Ca and 243Am ions lead to the 288Uup (288115) and 287Uup (287115). A total of thirty correlated α-decay chains were observed following the reactions.
On 12 August 2013 experiments involving zinc ions travelling at 10% of the speed of light colliding with a thin bismuth layer apparently produced a very heavy ion followed by a chain of six consecutive alpha decays identified as products of an isotope of element 113 278Uut - see new evidence for elements 113.
Confirmation of the discoveries of and name proposals for elements 114 (flerovium) and 116 (livermorium)
A news reports from IUPAC (more about flerovium and livermorium) indicates the confirmation of the discoveries of elements 114 and 116: Discovery of the Elements with Atomic Number 114 and 116. Proposals by the discoverers for the names of the two elements have now announced as:
- element 114: Flerovium (Fl) after the physicist Georgiy Flerov. Georgiy N. Flerov (1913-1990) was a renowned physicist who discovered the spontaneous fission of uranium and was a pioneer in heavy-ion physics.
- element 116: Livermorium (Lv), after the Livermore laboratories. A group of researchers from the Laboratory, along with scientists at the Flerov Laboratory of Nuclear Reactions, participated in the work carried out in Dubna on the synthesis of superheavy elements, including element 116.
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You can buy these periodic table posters online and others at our WebElements periodic table shop.
Element 117 discovered?
A paper just published (5 April 2010) in Physical Review Letters by Yu. Ts. Oganessian and others claims the synthesis of a new element with atomic number 117. The abstract states "The discovery of a new chemical element with atomic number Z=117 is reported. The isotopes 293117 and 294117 were produced in fusion reactions between 48Ca and 249Bk. Decay chains involving eleven new nuclei were identified by means of the Dubna Gas Filled Recoil Separator. The measured decay properties show a strong rise of stability for heavier isotopes with Z>=111, validating the concept of the long sought island of enhanced stability for super-heavy nuclei." Read more: Physical Review Letters: element 117 preliminary publication
