90 in ground state
Thorium is a metal element. There are 90 electrons in a single atom.
Alpha particles but also electrons and gamma radiations (Th 232).
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 itself is not a fuel, it does not emit energy. However if it is irradiated in a reactor it forms uranium233 which is a fissile isotope of uranium. Therefore potentially thorium can be used to breed fissile fuel. There are issues around reprocessing however which have not been tackled because the incentive is not there whilst uranium235 is available. Thorium might become important in the future, or for a country which has thorium but not uranium. See link below
alpha particles.
Thorium has 90 electrons.
Thorium 230 has 90 electrons and 140 neutrons.
Thorium is a metal element. There are 90 electrons in a single atom.
Thorium has 90 electrons.
232Th has 142 neutrons and 90 protons and electrons.
Thorium 230 has 90 protons and 140 neutrons - the difference is 50.
Thorium-232 has 90 protons and electrons and 142 neutrons.
Thorium's atomic number is 90. Thus, thorium has 90 protons per atom. To be electrically neutral then, thorium must also have 90 electrons per atom.
Thorium has 90 electrons.
Thorium (Th).
Thorium nucleus has 90 protons and electrons and 142 neutrons.
Thorium (232Th) has 90 protons, 9o electrons and 142 neutrons.