In a large collection of atoms, there is a definite time, called the half-life of the isotope, after which one-half of the total number of nuclei would have decayed. This time varies from few-millionths of a second to millions of years for different radioactive isotopes.adioactivity, also known as radioactive decay, is a process by which a radioactive isotope loses subatomic particles (helium nuclei or electrons) from its nucleus along with usual emission of gamma radiation, and becomes a different element.
This page uses Creative Commons Licensed content from Wikipedia (view authors). Fifth Harmony (also 5th Harmony or 5H and formerly LYLAS and later 1432) is an American girl group, between the ages of 18-22, consisting of members Dinah Jane Hansen, Ally Brooke, Camila Cabello, Normani Kordei and Lauren Jauregui.
Fifth Harmony are an all-female contemporary R&B vocal group who formed in 2012 while competing on the second season of Fox's The X Factor.Featured in Fifth Harmony are vocalists Camila Cabello, Normani Kordei Hamilton, Lauren Jauregui, Allyson Brooke Hernandez, and Dinah Jane Hansen.riginally, the members of the band entered The X Factor competition individually as solo artists and were then placed together by judge Simon Cowell to compete in the groups category. Ultimately, Fifth Harmony finished in third place behind Carly Rose Sonenclar and first-place winner Tate Stevens.