Difference between revisions of "Technetium"

Technetium
Properties
Atomic symbol	Tc
Atomic number	43
Classification	Metallic
Atomic mass	97 amu
Number of Stable Isotopes	0
Other Information
Date of discovery	1937
Name of discoverer	Carlo Perrier and Emillo G. Segre
Name origin	from the Greek tekhnetos, meaning artificial.
Uses	Source of radiation for medical research.
Obtained from	Manufactured by bombarding Molybdenum with heavy hydrogen in a cyclotron. Only minute quantities have been found outside the laboratory, as a by-product of the fission of Uranium-238.

Revision as of 01:10, December 27, 2015

Technetium (tek-NEE-she-em) is a radioactive, silvery-grey synthetic metal.

Additional Properties

Melting Point: 3915°F (2157°C or 2430 K)

Boiling Point: 7709°F (4265°C or 4538 K)

Density: 11 grams per cubic centimeter

(Beta) Half-Life: 4.2 million years

History

In 1937, the Italian chemists Carlo Perrier and Emilio Segrè isolated Technetium using a cyclotron; it was the first artificially produced (synthetic) element. Since this element has such a short half-life, it cannot be found in nature.^[1] Before this time, it had been predicted but never found.^[2]

Uses

The primary use of Technetium is for medical exploration as a tracer. It can also be added to steel for corrosion resistance. This not usually practical, however, since it is a radioactive material.^[3]

References

External Resources

http://www.rsc.org/periodic-table/element/43/technetium

[1] ttp://education.jlab.org/itselemental/ele043.html

[2] ttp://www.newworldencyclopedia.org/entry/Technetium

[3] ttp://www.rsc.org/periodic-table/element/43/technetium

[1]

[2]

[3]

@@ Line 1: / Line 1: @@
-{{Element | name=Technetium | symbol=Tc | anumber=43 | amass=97 amu | state=Solid | class=Metallic | cstructure=Hexagonal | color=Silvery-gray | date=1937 | discname=Carlo Perrier and Emillo G. Segre | origname=from the Greek ''tekhnetos'', meaning ''artificial''. | uses=Source of radiation for medical research. | obtained=Manufactured by bombarding [[Molybdenum]] with [[heavy hydrogen]] in a [[cyclotron]]. Only minute quantities have been found outside the laboratory, as a by-product of the fission of Uranium-238. }}
+{{Element | name=Technetium | symbol=Tc | anumber=43 | amass=97 amu | state=Solid | class=Metallic | cstructure=Hexagonal | stableisotopes=0 | color=Silvery-gray | date=1937 | discname=Carlo Perrier and Emillo G. Segre | origname=from the Greek ''tekhnetos'', meaning ''artificial''. | uses=Source of radiation for medical research. | obtained=Manufactured by bombarding [[Molybdenum]] with [[heavy hydrogen]] in a [[cyclotron]]. Only minute quantities have been found outside the laboratory, as a by-product of the fission of Uranium-238. }}
 '''Technetium''' ''(tek-NEE-she-em)'' is a [[radioactive]], silvery-grey synthetic [[metal]].
@@ Line 9: / Line 9: @@
 Density: 11 grams per cubic centimeter
-(Gamma) Half-Life: 6.0058 hours<ref>http://education.jlab.org/itselemental/ele043.html</ref>
+(Beta) Half-Life: 4.2 million years
 ==History==
 In 1937, the Italian chemists Carlo Perrier and Emilio Segrè isolated Technetium using a cyclotron; it was the first artificially produced (synthetic) element.  Since this element has such a short half-life, it cannot be found in nature.<ref>http://education.jlab.org/itselemental/ele043.html</ref>  Before this time, it had been predicted but never found.<ref>http://www.newworldencyclopedia.org/entry/Technetium</ref>

Periodic Table of the Elements
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
1 H 1.008																	2 He 4.003
3 Li 6.939	4 Be 9.0122											5 B 10.811	6 C 12.011	7 N 14.007	8 O 15.999	9 F 18.998	10 Ne 10.183
11 Na 22.99	12 Mg 24.312											13 Al 26.982	14 Si 28.086	15 P 30.974	16 S 32.064	17 Cl 35.453	18 Ar 39.948
19 K 39.102	20 Ca 40.08	21 Sc 44.956	22 Ti 47.9	23 V 50.942	24 Cr 51.996	25 Mn 54.938	26 Fe 55.847	27 Co 58.933	28 Ni 58.71	29 Cu 63.546	30 Zn 65.37	31 Ga 69.72	32 Ge 72.59	33 As 74.922	34 Se 78.96	35 Br 79.904	36 Kr 83.8
37 Rb 85.47	38 Sr 87.62	39 Y 88.905	40 Zr 91.22	41 Nb 92.906	42 Mo 95.94	43 Tc [97]	44 Ru 101.07	45 Rh 102.91	46 Pd 106.4	47 Ag 107.87	48 Cd 112.4	49 In 114.82	50 Sn 118.69	51 Sb 121.75	52 Te 127.6	53 I 126.9	54 Xe 131.3
55 Cs 132.91	56 Ba 137.34	57* La 138.91	72 Hf 178.49	73 Ta 180.95	74 W 183.85	75 Re 186.2	76 Os 190.2	77 Ir 192.2	78 Pt 195.09	79 Au 196.97	80 Hg 200.59	81 Tl 204.37	82 Pb 207.19	83 Bi 208.98	84 Po 210	85 At 210	86 Rn 222
87 Fr 215	88 Ra 226.03	89** Ac 227.03	104 Rf [261]	105 Db [262]	106 Sg [266]	107 Bh [264]	108 Hs [265]	109 Mt [268]	110 Dt [271]	111 Rg [272]	112 Cn [277]	113 Nh [284]	114 Fv [289]	115 Mc [288]	116 Lv [292]	117 Ts [293]	118 Og [294]

*Lanthanides		58 Ce 140.12	59 Pr 140.91	60 Nd 144.24	61 Pm 145	62 Sm 150.35	63 Eu 151.96	64 Gd 157.25	65 Tb 158.92	66 Dy 162.5	67 Ho 164.93	68 Er 167.26	69 Tm 168.93	70 Yb 173.04	71 Lu 174.97

**Actinides		90 Th 232.04	91 Pa 231	92 U 238.03	93 Np 237.05	94 Pu 239.05	95 Am 241.06	96 Cm 244.06	97 Bk 249.08	98 Cf 252.08	99 Es 252.08	100 Fm 257.1	101 Md 258.1	102 No 259.1	103 Lr 262.11