The first periodic table to become generally accepted was that of the Russian chemist Dmitri Mendeleev in 1869: he formulated the periodic law as a dependence of chemical properties on atomic mass.

This video is an interactive lesson in calculating an atom’s mass and atomic number. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of ...

Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table’s arrangement also allows scientists to discern trends in ...

The periodic table that we follow for our studies is the Modern Periodic Table, which is based on atomic number rather than atomic mass. This arrangement was established by the British physicist ...

6 Oganesson (Og) is the most recently added superheavy element (SHE) in the periodic table. It completes the seventh period and belongs to group 18 of the noble gases. So far, only five atoms of ...

Both 1- and 2-dimensional periodic structures have been studied ... Results on the rate of shrinkage of atomic islands and holes on 2-dimensional grating structures indicate that mass transport is ...