About   |   More   |   Search
ChemLin Logo

Silicon-28

Properties and data of the isotope 28Si.


Content

See also: list of Silicon isotopes.

 

General data

Name of the isotope:Silicon-28; Si-28Symbol:28Si or 2814SiMass number A:28 (= number of nucleons)Atomic number Z:14 (= number of protons)Neutrons N:14Isotopic mass:27.976926535(3) u (atomic weight of Silicon-28)Nuclide mass:27.9692465 u (calculated nuclear mass without electrons)Mass excess:-21.49279 MeVMass defect:0.253932737 u (per nucleus)Nuclear binding energy:236.53682092 MeV (per nucleus)
8.4477436 MeV (average binding energy per nucleon)
Separation energy:SN = 17.17961(11) MeV (first neutron)
SP = 11.58490(5) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
0+Charge radius:3.1224(23) femtometer fmYear of discovery:1920

 

Parent Nuclides

Direct parent isotopes are: 28P, 28Al, 29S, 31Ar, 32Cl.

 

Occurrence

Comparison of the natural Silicon isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Silicon
Isotopic mixture
28.085 u100 %
Isotope 28Si27.976926535(3) u92.254 %
[92.191 - 92.318 %]
stable0+
Isotope 29Si28.976494665(3) u4.673 %
[4.645 - 4.699 %]
stable1/2+
Isotope 30Si29.97377001(2) u3.073 %
[3.037 - 3.110 %]
stable0+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 14) and isobaric (same nucleon number A = 28) with Silicon-28. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 14Isobar A = 28
519B
620C
721N
822O28O
923F28F
1024Ne28Ne
1125Na28Na
1226Mg28Mg
1327Al28Al
1428Si28Si
1529P28P
1630S28S
1731Cl28Cl
1832Ar
1933K
2034Ca

 

External data and identifiers

Adopted Levels, Gammas:NuDat 28Si

 


More Chemistry

isotopes

 

 

 

 

Social Media

Facebook

LinkedIn

Twitter

 

 


Last update: 2020-10-12


© 1996 - 2024 ChemLin