WebElements Periodic Table	WebElements Periodic Table Scholar Edition	Periodic table poster	Chemdex	Chemputer	Chemistry forums	Chemistry news	Chemistry blogs

Chemistry » WebElements Periodic Table » Home page

WebElements periodic table of the elements

The periodic table of the chemical elements is an arrangement of the elements ordered by atomic number in columns (groups) and rows (periods) so as to emphasize their periodic properties. WebElements is the periodic table on the web.

Group	1	2		3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period
1	1 H																		2 He
2	3 Li	4 Be												5 B	6 C	7 N	8 O	9 F	10 Ne
3	11 Na	12 Mg												13 Al	14 Si	15 P	16 S	17 Cl	18 Ar
4	19 K	20 Ca		21 Sc	22 Ti	23 V	24 Cr	25 Mn	26 Fe	27 Co	28 Ni	29 Cu	30 Zn	31 Ga	32 Ge	33 As	34 Se	35 Br	36 Kr
5	37 Rb	38 Sr		39 Y	40 Zr	41 Nb	42 Mo	43 Tc	44 Ru	45 Rh	46 Pd	47 Ag	48 Cd	49 In	50 Sn	51 Sb	52 Te	53 I	54 Xe
6	55 Cs	56 Ba	*	71 Lu	72 Hf	73 Ta	74 W	75 Re	76 Os	77 Ir	78 Pt	79 Au	80 Hg	81 Tl	82 Pb	83 Bi	84 Po	85 At	86 Rn
7	87 Fr	88 Ra	**	103 Lr	104 Rf	105 Db	106 Sg	107 Bh	108 Hs	109 Mt	110 Ds	111 Rg	112 Uub	113 Uut	114 Uuq	115 Uup	116 Uuh	117 Uus	118 Uuo

*Lanthanoids			*	57 La	58 Ce	59 Pr	60 Nd	61 Pm	62 Sm	63 Eu	64 Gd	65 Tb	66 Dy	67 Ho	68 Er	69 Tm	70 Yb
**Actinoids			**	89 Ac	90 Th	91 Pa	92 U	93 Np	94 Pu	95 Am	96 Cm	97 Bk	98 Cf	99 Es	100 Fm	101 Md	102 No

Shop: periodic table posters, mugs, t-shirts, games, ties, mousemats, ....	Chemistry Books (USA)	Chemistry Books (UK)	Chemistry Books (CA)	Chemiebücher (Deutschland)

New periodic table poster

WebElements has collaborated with Theodore Gray to produce a stunning new glossy laminated periodic table poster (it's big: 39.4 x 27.3 inches - 100 x 69 cm) showing his fantastic photographs of the elements. The style of the poster is such that it pairs beautifully with our existing periodic table poster. You can order it now from our online shop.

Periodic table poster

The periodic table

The periodic "law" of chemistry recognises that many properties of the chemical elements are periodic functions of their atomic number (the number of protons within the element's atomic nucleus). The periodic table is an arrangement of the chemical elements ordered by atomic number in columns (groups) and rows (periods) presented so as to emphasize their periodic properties.

The element polonium is very much in the news at present, perhaps for the first time ever, and for the wrong reasons. This site does contain further information about polonium.

The groups (columns in the periodic table) are numbered 1-18. Some groups enjoy non-systematic names as well. The include Group 1 (alkali metals), Group 2 (alkaline earth metals), Group 15 (pnictogens, or pnicogens), Group 16 (chalcogens), Group 17 (halogens) and Group 18 (noble gases). While not groups in the periodic table, some other groupings of elements are often named as well. These include the lanthanoids (less preferably lanthanides) and actinoids (less preferably actinides).

There are many different ways, sometimes ingenious, of arranging the chemical elements according to which properties are of particular interest but that shown here is a standard form of the periodic table. The relative merits of various other periodic table organisations is still the subject of debate. Particularly useful versions include the following:

While the name Dmitri Mendeleev is usually credited with the with the form of periodic table as we know it today, many other excellent researchers made profound contributions to its development, including Antoine Lavoisier, Jöns Jakob Berzelius, Johann Döbereiner, John Newlands, Alexandre-Émile Béguyer de Chancourtois, Lothar Meyer, and others.

More resources

Print your own periodic table. Print this pdf file for your personal use
Sponsor an element
FlashElements for your PC or Mac
PalmElements for your Palm
WapElements™ for your Wap phone
Chemistry search engine *NEW*

Notes

WebElements was the first periodic table on the WWW (launched September 1993). See also: WebElements Scholar Edition - for chemistry and other students at universities and schools.
WebElements aims to be a high quality source of chemistry information on the WWW relating to the periodic table. Coverage is such that professional scientists and students at school interested in chemistry and other sciences will all find something useful.
Author: Mark Winter [Department of Chemistry, University of Sheffield, England]
On average, more than 55000 people use WebElements every day and there were over 75 million page views in the last 12 months
Awards: WebElements is pleased to be the recipient of numerous awards including the Royal Society of Chemistry 1998 HE Teaching Award winner, the ScientificAmerican.com winner of the 2002 Sci/Tech Web Awards, one of the MARS Best of Free Reference Web Sites of 2001 (MARS is the Machine-Assisted Reference Section of the Reference and User Services Association of the American Library Association), featured in the Institute for Scientific Information's (ISI) premium collection of evaluated scholarly Web sites called Current Web Contents., and WebElements is rated as Best of the Web by Britannica.com. Most recently, the MERLOT (Multimedia educational resource for on-line learning and teaching) chemistry editorial board selected "WebElements" as its choice for a Chemistry 2005 Classics Award.

WebElements is the periodic table on the WWW

WebElements™, the periodic table on the WWW, URL: http://www.webelements.com/
Copyright 1993-2007 Mark Winter [The University of Sheffield and WebElements Ltd, UK]. All rights reserved.
Document served: Wednesday 3rd January, 2007