Isotopes of beryllium
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2008-06-30T15:19:54Z
79.183.153.232
Although '''[[beryllium]]''' ('''Be''') has multiple '''[[isotope]]s''', only one of these isotopes is stable; as such, it is considered a monoisotopic element.
<br/>Standard atomic mass: 9.012182(3) [[unified atomic mass unit|u]]
== Table ==
{| class="wikitable" style="font-size:95%; white-space:nowrap"
! rowspan="2" | nuclide<br />symbol
! Z([[proton|p]])
! N([[neutron|n]])
! <br />isotopic mass (u)<br />
! rowspan="2" | half-life
! rowspan="2" | nuclear<br />spin
! rowspan="2" | representative<br />isotopic<br />composition<br />(mole fraction)
! rowspan="2" | range of natural<br />variation<br />(mole fraction)
|-
! colspan="3" | excitation energy
|-
| <sup>5</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 1
| 5.04079(429)#
|
| (1/2+)#
|
|
|-
| <sup>6</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 2
| 6.019726(6)
| 5.0(3)E-21 s [0.092(6) MeV]
| 0+
|
|
|-
| <sup>7</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 3
| 7.01692983(11)
| 53.22(6) d
| 3/2-
|
|
|-
| <sup>8</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 4
| 8.00530510(4)
| 6.7(17)E-17 s [6.8(17) eV]
| 0+
|
|
|-
| <sup>9</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 5
| 9.0121822(4)
| STABLE
| 3/2-
| 1.0000
|
|-
| <sup>10</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 6
| 10.0135338(4)
| 1.51(6)E+6 a
| 0+
|
|
|-
| <sup>11</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 7
| 11.021658(7)
| 13.81(8) s
| 1/2+
|
|
|-
| <sup>12</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 8
| 12.026921(16)
| 21.49(3) ms
| 0+
|
|
|-
| <sup>13</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 9
| 13.03569(8)
|
|
|
|
|-
| <sup>14</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 10
| 14.04289(14)
| 4.84(10) ms
| 0+
|
|
|-
| <sup>15</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 11
| 15.05346(54)#
| <200 ns
|
|
|
|-
| <sup>16</sup>Be
| style="text-align:right" | 4
| style="text-align:right" | 12
| 16.06192(54)#
| <200 ns
| 0+
|
|
|}
=== Notes ===
* Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
* Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.
== References ==
* Isotope masses from [http://www.nndc.bnl.gov/amdc/index.html Ame2003 Atomic Mass Evaluation] by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in ''Nuclear Physics'' A729 (2003).
* Isotopic compositions and standard atomic masses from [http://www.iupac.org/publications/pac/2003/7506/7506x0683.html Atomic weights of the elements. Review 2000 (IUPAC Technical Report)]. ''Pure Appl. Chem.'' Vol. 75, No. 6, pp. 683-800, (2003) and [http://www.iupac.org/news/archives/2005/atomic-weights_revised05.html Atomic Weights Revised (2005)].
* Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
** Audi, Bersillon, Blachot, Wapstra. [http://amdc.in2p3.fr/web/nubase_en.html The Nubase2003 evaluation of nuclear and decay properties], Nuc. Phys. A 729, pp. 3-128 (2003).
** [[National Nuclear Data Center]], Brookhaven National Laboratory. Information extracted from the [http://www.nndc.bnl.gov/nudat2/ NuDat 2.1 database] (retrieved Sept. 2005).
** David R. Lide (ed.), Norman E. Holden in ''CRC Handbook of Chemistry and Physics, 85th Edition'', online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.
{{Isotope nav | element=beryllium | lighter=Isotopes of lithium | heavier=Isotopes of boron }}
[[Category:Isotopes|Beryllium]]
[[Category:Beryllium]]
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[[tr:Berilyum izotopları]]
[[zh:鈹的同位素]]