The atomic number of thorium, Th, is 90 and it is an inner transition element in the Actinide series. The Actinide series is the second of the two series shown by themselves. It starts Actinium, Thorium, Protactinium, and Uranium, so Thorium is the second element in the Actinide series.
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Th is element number 90 on the periodic table It is thorium, it is in the Actinides, and it is radioactive
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.
Thorium is generally known by its chemical name "Thorium." However, it may also be referred to as "Th" on the periodic table.
Lanthanum is located on the right to the bottom side on the periodic table.
All chemical elements are placed in the periodic table.
ewan q . pota
Th is element number 90 on the periodic table It is thorium, it is in the Actinides, and it is radioactive
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.
Element 90 is thorium.
Thorium is generally known by its chemical name "Thorium." However, it may also be referred to as "Th" on the periodic table.
Thorium is a member of the actinoids family; it is also placed in the period 7 of the periodic table of Mendeleev.
Hydrogen is located in Group 1A of the Periodic Table.
Metals are located on the left side of the periodic table.
Metals are located on the left side of the periodic table.
Lanthanum is located on the right to the bottom side on the periodic table.
On the right side of the periodic table