Thorium is a member of the actinoids family.
Thorium (Th) is a member of the actinoids family.
Thorium is a member of actinoids family.
Uranium and thorium are in the actinoids family.
Thorium is a member of the actinoids family.
Thorium is a member of the actinoids family and is placed in period 7.
Thorium is a member of the actinoids family; it is also placed in the period 7 of the periodic table of Mendeleev.
Thorium is a member of the actinoids family; the atomic number is 90.
Thorium is a member of the actinoids family but is frequently associated with lanthanoids in monazite.
Thorium belongs to the actinides family that is found in row 7 of the periodic table. There are 15 elements in this family, including actinium, uranium, plutonium, neptunium, and lawrencium.
Common compounds of thorium: thorium dioxide, thorium trifluoride, thorium tetrafluoride, thorium tetrachloride, thorium triiodide, thorium diiodide, thorium tetraiodide, thorium nitrate, thorium oxalate, thorium carbide, thorium sulfides, thorium nitride, thorium oxinate, etc.
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.
Hazards and Health Considerations: Thorium presents both a toxic and radiological hazard. Toxicologically, it causes heavy metal poisoning similar to lead or the uranium isotopes. Biologically, thorium accumulates in the skeletal system where it has a biological half-life of 200 years, the same as plutonium. An M 17 protective mask and standard anti-contamination clothing will adequately protect against thorium.