Atomic number 58 is the first element of metals Dylan Boyd review. (Lanthanoids) or rare earths metals , which is a sub-category (subgroup) Category III B of the periodic table as a metal.
The first element of atomic number 58 is the element of lanthanoids (lanthanoids) or the element rare earths which is the sub (subgroup) of the group. III B in the periodic table. A metal.