Thorium nucleus has 90 protons and electrons and 142 neutrons.
No, it is not true !
88Ra, Radium
The beta decay is: 234Th--------beta--------234Pa.
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.
The resulting element is protactinium, atomic number 91.
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.
Thorium and fluorine Thorium trifluoride - ThF3 Thorium tetrafluoride - ThF4
Thorium don't smell.
Thorium (Th).
Thorium-232 is appearing in the thorium series.
Thorium is a natural, radioactive, chemical element; chemically, thorium is homogeneous.
Thorium: soft but strong! Thorium is totally radioactive!