งานเกษตรแฟร์ 2012: 2013

Explore **key information** about the chemical elements through this periodic table
Group	1	2		3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period
1	1 H 1.008																		2 He 4.0026
2	3 Li 6.94	4 Be 9.0122												5 B 10.81	6 C 12.011	7 N 14.007	8 O 15.999	9 F 18.998	10 Ne 20.180
3	11 Na 22.990	12 Mg 24.305												13 Al 26.982	14 Si 28.085	15 P 30.974	16 S 32.06	17 Cl 35.45	18 Ar 39.948
4	19 K 39.098	20 Ca 40.078		21 Sc 44.956	22 Ti 47.867	23 V 50.942	24 Cr 51.996	25 Mn 54.938	26 Fe 55.845	27 Co 58.933	28 Ni 58.693	29 Cu 63.546	30 Zn 65.38	31 Ga 69.723	32 Ge 72.63	33 As 74.922	34 Se 78.96	35 Br 79.904	36 Kr 83.798
5	37 Rb 85.468	38 Sr 87.62		39 Y 88.906	40 Zr 91.224	41 Nb 92.906	42 Mo 95.96	43 Tc [97.91]	44 Ru 101.07	45 Rh 102.91	46 Pd 106.42	47 Ag 107.87	48 Cd 112.41	49 In 114.82	50 Sn 118.71	51 Sb 121.76	52 Te 127.60	53 I 126.90	54 Xe 131.29
6	55 Cs 132.91	56 Ba 137.33	*	71 Lu 174.97	72 Hf 178.49	73 Ta 180.95	74 W 183.84	75 Re 186.21	76 Os 190.23	77 Ir 192.22	78 Pt 195.08	79 Au 196.97	80 Hg 200.59	81 Tl 204.38	82 Pb 207.2	83 Bi 208.98	84 Po [208.98]	85 At [209.99]	86 Rn [222.02]
7	87 Fr [223.02]	88 Ra [226.03]	**	103 Lr [262.11]	104 Rf [265.12]	105 Db [268.13]	106 Sg [271.13]	107 Bh [270]	108 Hs [277.15]	109 Mt [276.15]	110 Ds [281.16]	111 Rg [280.16]	112 Cn [285.17]	113 Uut [284.18]	114 Fl [289.19]	115 Uup [288.19]	116 Lv [293]	117 Uus [294]	118 Uuo [294]

*Lanthanoids			*	57 La 138.91	58 Ce 140.12	59 Pr 140.91	60 Nd 144.24	61 Pm [144.91]	62 Sm 150.36	63 Eu 151.96	64 Gd 157.25	65 Tb 158.93	66 Dy 162.50	67 Ho 164.93	68 Er 167.26	69 Tm 168.93	70 Yb 173.05
**Actinoids			**	89 Ac [227.03]	90 Th 232.04	91 Pa 231.04	92 U 238.03	93 Np [237.05]	94 Pu [244.06]	95 Am [243.06]	96 Cm [247.07]	97 Bk [247.07]	98 Cf [251.08]	99 Es [252.08]	100 Fm [257.10]	101 Md [258.10]	102 No [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.

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Latest news

On August 12th 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 ^278>Uut - 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.

Buy Periodic Table posters

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 3

22.990

24.305

26.982

28.085

30.974

32.06

35.45

39.948

22.990

24.305

26.982

28.085

30.974

32.06

35.45

39.948

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ВЫХОДИТ ЕЖЕДНЕВНО
Tuesday, 8 January, 2013

Posted on January 7, 2013 by CJ

We are going to see the territory of the former research center of aerospace industry situated in the Moscow region, in the city called Peresvet. One can spend hours walking there though the place already resembles a cemetery.

Advertisement:

It is a cover of the test stand for rocket and aircraft engines.

There is a vacuum test chamber in that gray building.

But let us get inside…

อุทยานแห่งชาติพลิตวิเซ่ เจเซร่า (National Park Plitvice Jezera) ประเทศโครเอเชีย นับว่าเป็นอุทยานแห่งชาติที่มีความอุดมสมบูรณ์มาก จนได้รับการขึ้นทะเบียนเป็นมรดกโลกโดยองค์การ UNESCO เมื่อปี 1979 ครั้งหนึ่งที่เคยมี Forward Mail ฉบับหนึ่ง ปรากฏเป็นภาพทะเลสาบสีฟ้ามรกตระยิบระยับ พาดผ่านด้วยทางเดินไม้รูปโค้งอันงดงาม แทรกด้วยน้ำตกเล็กๆไหลรินเป็นสาย ราวกับเป็นอุทยานสวรรค์.. ถูกส่งต่อๆกันเป็นวงกว้าง จนเป็นที่กล่าวขานและเข้าใจผิดว่าอุทยานแห่งนี้ เป็นภาพจากน้ำตกเหลาเหลียง จ.ตรัง จนถึงขั้นชาวเน็ต ตามหากันยกใหญ่ว่าอุทยานแห่งนี้อยู่ที่ประเทศไทยของเราจริงหรือไม่.. ต้นตอของ Forward Mail ฉบับนั้นไม่ทราบว่ามาจากที่ใด.. แม้อุทยานแห่งนี้จะอยู่ไกลถึงประเทศโครเอเชีย แต่ผมเชื่อว่าอุทยานฯต่างๆ ของไทยก็งดงามดุจสรวงสวรรค์ไม่แพ้กัน.. เชิญแวะชมตามอัธยาศัยครับ...

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