Thorium, or Th, has an atomic number of 90. That means that every atom of thorium has 90 protons. The only naturally abundant isotope of thorium is 232Th, and so therefore it has 232 - 90 = 142 neutrons.
the answer is 142, you have to subtract the number of protons from the mass number and you get the number of neutrons. Neutrons + Protons = Mass Number
Protons = 90 Electrons = 90 Nuetrons = 142 I'm not sure about the Nuetrons. I'm almost positive I'm right, but just check with someone/something else just to make sure.
90 protons, 90 electrons
Th-232 isotope has 142 neutrons
Thorium has 90 protons, 90 electrons and 142 neutrons.
Thorium-232 has 90 protons and electrons and 142 neutrons.
Thorium has 6 natural radioactive isotopes but only Th-232 is important.
Thorium has 90 electrons.
Thorium has 90 protons.
Thorium has 90 protons.
232Th has 142 neutrons and 90 protons and electrons.
Thorium, with the chemical symbol Th, is the chemical element with the atomic number 90.
Thorium has 6 valence electrons.
Uranium (U) has 90 electrons as a neutral atom.
Thorium (Th) is an inner transition metal with 90 electrons. It is a radioactive element that belongs to the actinide series of the periodic table.
Thorium has 90 electrons.
Thorium has 90 electrons.
Thorium is a metal element. There are 90 electrons in a single atom.
Thorium 230 has 90 electrons and 140 neutrons.
Thorium has 90 electrons.
Thorium-232 has 90 protons and electrons and 142 neutrons.
232Th has 142 neutrons and 90 protons and electrons.
Thorium 230 has 90 protons and 140 neutrons - the difference is 50.
Thorium (232Th) has 90 protons, 9o electrons and 142 neutrons.
Thorium-238 has 90 protons and electrons and 148 neutrons.
Thorium, with the chemical symbol Th, is the chemical element with the atomic number 90.
Thorium has 90 electrons.