[Excerpt] 2019 is the 150th anniversary of
the Periodic Table of Chemical Elements and
has therefore been proclaimed the
"International Year of the Periodic Table of
Chemical Elements (IYPT2019)" by the
United Nations General Assembly and
UNESCO [1].
A working tool very useful to various
professionals and in diverse scientific areas,
this table would not exist if someone had not
distributed and ordered the chemical
elements according to the value of their
atomic weights. The father of the Periodic
Table, the Russian chemist Dmitri Mendeleev
(1834-1907), was so visionary that his Table
allows housing not only the known chemical
elements at that time but also the ones still
unknown that came to be discovered or
synthesized. When we come across this
Table, with so many chemical elements, we
ask ourselves how we use them and where
we can find each of them, in our real world
