Таллий
Periodic table of D.I. Mendeleev, the names and properties of chemical elements.
Таллий — element of 13 group 6 period. Atomic number is 81.
Atomic mass is 204,3833. Latin name is Thallium. Discovered in 1861 year.
In a separate figure shows the conditional distribution of the atoms in orbits. Please note that the actual orbitals have a different shape.
