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 a Woman (album) mellow, meaty melodies." Chuck Arnold wrote for "People" that "her sultry, husky alto shines as she bends and jazzily twists notes with that special Toni touch." Arnold realized that "Although the rest of the album doesn't quite match that quality, it's still easily More than your average R&B-pop fare." Launch.com was positive towards the theme of the songs, writing that "all this anger's not just therapeutic – it also makes her transition to hard hip-hop diva seem sensible, instead of just a marketing move, by grounding it in something real." Keysha Davis from BBC Music thought that "More Than a