Editing Beta decay (section)

===Stability of naturally occurring nuclides===
Most naturally occurring nuclides on earth are beta stable. Nuclides that are not beta stable have [[half-life|half-lives]] ranging from under a second to periods of time significantly greater than the [[age of the universe]]. One common example of a long-lived isotope is the odd-proton odd-neutron nuclide {{nuclide|link=yes|Potassium|40}}, which undergoes all three types of beta decay ({{SubatomicParticle|Beta-}}, {{SubatomicParticle|Beta+}} and electron capture) with a half-life of {{val|1.277|e=9|u=years}}.<ref>
{{Cite web
 |title=WWW Table of Radioactive Isotopes, Potassium 40
 |publisher=Lawrence Berkeley National Laboratory
 |work=LBNL Isotopes Project
 |access-date=2014-09-18
 |url=http://ie.lbl.gov/toi/nuclide.asp?iZA=190040
 
 |archive-url=https://web.archive.org/web/20131009123338/http://ie.lbl.gov/toi/nuclide.asp?iZA=190040
 |archive-date=2013-10-09
}}</ref>