The mass defect of thorium refers to the difference between the mass of the individual protons and neutrons in its nucleus and the actual mass of the thorium atom. This mass defect arises because some mass is converted into binding energy that holds the nucleus together, as described by Einstein's equation, E=mc². For thorium-232, which is the most common isotope, the mass defect is approximately 0.180 Atomic Mass units (u). This binding energy is crucial for the stability of the nucleus.
When uranium undergoes alpha decay, it emits an alpha particle (which consists of 2 protons and 2 neutrons) and transforms into thorium. The mass of the thorium produced can be determined by subtracting the mass of the emitted alpha particle from the original mass of the uranium nuclide. The specific mass of thorium will depend on the isotope of uranium that is decaying, but it generally corresponds to the mass number of the uranium minus 4 (for the alpha particle).
The mass defect of neon refers to the difference between the total mass of its individual protons and neutrons and the actual mass of the neon nucleus. Neon has an atomic mass of approximately 20.18 u, and its most abundant isotope, neon-20, consists of 10 protons and 10 neutrons. The mass defect can be calculated by determining the mass of the individual nucleons and subtracting the mass of the nucleus, which results in a mass defect of about 0.226 u for neon-20. This mass defect is a reflection of the binding energy that holds the nucleus together.
You have it backwards. The atomic weight of thorium 90 is 232.0381
Thorium constitutes about 4E-8% of the visible baryonic matter of the universe by mass. Visible baryonic matter is about 4.9% of the total mass of the universe, as per the latest estimates. So the mass-percentage of thorium in the universe would be 4E-8 x 0.049 = ... very little.
E=mc2. There is potential energy involved in a chemical reaction, or in a nuclear reaction; in both cases, less potential energy means less mass, because of the equivalence of mass and energy. (Note: In chemical reactions, the mass defect is so tiny that it is usually ignored.)
The atomic weight (not mass !) of thorium is 232,0381.
Thorium, with the chemical symbol Th, is the chemical element with the atomic number 90.
thorium
The atomic weight of thorium 232 is 232,0381
232.0381
When uranium undergoes alpha decay, it emits an alpha particle (which consists of 2 protons and 2 neutrons) and transforms into thorium. The mass of the thorium produced can be determined by subtracting the mass of the emitted alpha particle from the original mass of the uranium nuclide. The specific mass of thorium will depend on the isotope of uranium that is decaying, but it generally corresponds to the mass number of the uranium minus 4 (for the alpha particle).
The mass defect of neon refers to the difference between the total mass of its individual protons and neutrons and the actual mass of the neon nucleus. Neon has an atomic mass of approximately 20.18 u, and its most abundant isotope, neon-20, consists of 10 protons and 10 neutrons. The mass defect can be calculated by determining the mass of the individual nucleons and subtracting the mass of the nucleus, which results in a mass defect of about 0.226 u for neon-20. This mass defect is a reflection of the binding energy that holds the nucleus together.
Nuclear binding energy is the energy required to hold the nucleus together. The mass defect is the difference between the mass of a nucleus and the sum of the masses of its individual protons and neutrons. The mass defect is converted into nuclear binding energy according to Einstein's famous equation, E=mc^2, where E is the energy, m is the mass defect, and c is the speed of light.
The mass of a nucleus is subtracted from the sum of the masses of its individual components.
You have it backwards. The atomic weight of thorium 90 is 232.0381
Thorium constitutes about 4E-8% of the visible baryonic matter of the universe by mass. Visible baryonic matter is about 4.9% of the total mass of the universe, as per the latest estimates. So the mass-percentage of thorium in the universe would be 4E-8 x 0.049 = ... very little.
If you add the exact mass of the protons, neutrons, and electrons in an atom you do not get the exact atomic mass of the isotope. The diference is called the mass defect. The difference between the mass of the atomic nucleus and the sum of the masses of the particles within the nucleus is known as the mass defect.