Chemical substance can be transmuted into another element through a nuclear reaction. This is so, because all of the atoms in a sample of an element have the same number of protons, though they may be different isotopes, with differing numbers of neutrons. As of 2012, there are 118 known elements, about 80 of which are stable – that is, they do not change by radioactive decay into other elements. Some elements can occur as more than a single chemical substance (allotropes). For instance, oxygen exists as both diatomic oxygen (O) and ozone (O). The majority of elements are classified as metals.
More than This (One Direction song) the tour concluded in April 2011, the group continued working on "Up All Night". "More than This", confirmed to be released as "Up All Night" fourth single by Sony Music Australia in early May 2012, was released via digital download on 25 May 2012. The digital download contains the principal recording, and live versions of the number itself, "What Makes You Beautiful", "Gotta Be You", and "Up All Night". Produced by Brian Rawling and Paul Meehan, and written by Jamie Scott, "More than This" is an acoustic pop ballad that runs for 3:48 (3 minutes, 48 seconds). The chorus of