Thorium is a member of the actinoids family, period 7 in the periodic table of Mendeleev. The half life of 232Th is 1,405.1010 years.
ewan q . pota
Th is element number 90 on the periodic table It is thorium, it is in the Actinides, and it is radioactive
Thallium Wrong, check the periodic table, it's "Thorium" number 90 on the table
Element 90 is thorium.
Thorium is a member of the actinoids family; it is also placed in the period 7 of the periodic table of Mendeleev.
Group 7 of the periodic table.
metals
geg
alkali
Sulfur (S, element number 16) is on the third period of the periodic table.
Examples: hydrogen, iron, iodine, thorium, palladium, niobium, francium, boron.