The nonmetal elements occupy the upper righthand corner of the periodic table. This is a list of the nonmetals in order of increasing atomic number.| Science Notes and Projects
Get the allotrope definition in chemistry. See examples of allotropes of different elements, including those of carbon and oxygen.| Science Notes and Projects
Get the definition of an isotope. See examples of isotopes and learn the difference between an isotope and a nuclide of an element.| Science Notes and Projects