Difference between revisions of "Dubnium"

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Revision as of 23:14, August 15, 2016

Dubnium

Properties
Atomic symbol	Db
Atomic number	105
Classification	Transition metal
Atomic mass	262 amu
Other Information
Date of discovery	1970
Name of discoverer	Albert Ghiorso
Name origin	After Dubna, Russia.
Uses	Dubnium has no known uses.
Obtained from	Man-made.

Dubnium is an artificially produced radioactive element. The atomic weight of nine known isotopes range from 255 to 263; the longest-lived isotope, dubnium 268 has a half-life of 32 hours. Dubnium is very unstable and little is known about it.^[1]

References

↑ http://www.lenntech.com/periodic/elements/db.htm#ixzz0fXKrhPDT

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

Retrieved from "https://www.conservapedia.com/index.php?title=Dubnium&oldid=1270514"

Categories:

@@ Line 1: / Line 1: @@
 {{Element | name=Dubnium | symbol=Db | anumber=105 | amass=262 amu | noe=105 | class=Transition metal | cstructure=Unknown | color=Unknown | date=1970 | discname=[[Albert Ghiorso]] | origname=After Dubna, Russia. | uses=Dubnium has no known uses.| obtained=Man-made.  }}
-'''Dubnium''' is an artificially produced radioactive element. The atomic weight of nine known isotopes range from 255 to 263; the longest-lived isotope, dubnium 268 has a half-life of 32 hours. Dubnium is very unstable and little is known about it.
+'''Dubnium''' is an artificially produced radioactive element. The atomic weight of nine known isotopes range from 255 to 263; the longest-lived isotope, dubnium 268 has a half-life of 32 hours. Dubnium is very unstable and little is known about it.<ref>http://www.lenntech.com/periodic/elements/db.htm#ixzz0fXKrhPDT</ref>
 ==References==
-http://www.lenntech.com/periodic/elements/db.htm#ixzz0fXKrhPDT
+{{reflist}}
 {{Periodic table}}
 [[Category:Metals]]
 [[Category:Elements]]

Difference between revisions of "Dubnium"

Revision as of 23:14, August 15, 2016

References

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