Francium
Element 81 is thallium.
Radon
Radium
The eighty ninth element in the periodic table is Actinium, with the symbol Ac and atomic number 89. It is a radioactive element that is part of the actinide series.
The 83rd element in the periodic table is Bismuth (Bi). It is a post-transition metal and has an atomic number of 83.
The 85th element in the periodic table is astatine (At). Astatine is a rare and radioactive element that belongs to the halogen group, similar to fluorine and chlorine. It is primarily produced synthetically in laboratories due to its short half-life.
Element Eighty ended in 2006.
Element Eighty was created in 2000.
These elements are termed as 'lanthanides' and 'actinides' have certain different characteristics that cannot be fitted into modern periodic table,hence they are placed at the bottom.
eighty-seventh
Oh, dude, copper has been chilling on the periodic table since way back in the day. It was discovered way back in ancient times, like before Wi-Fi was even a thing. So yeah, copper has been part of the elemental squad for a looong time.
Kraft Television Theatre - 1947 The Eighty Seventh Precinct 11-37 was released on: USA: 25 June 1958