The countdown to the preparation for the health qualification examination, today we will share the nuclear medicine test points as follows:
1. Element:Any atom of the same class with the same number of protons is called an element. Such as: c, h, o
Isotopes:Elements with the same number of protons in their nuclei and different numbers of neutrons are isotopes to each other.
m Homogeneous allotonin:Nuclides that have the same number of protons and neutrons but different energy states in the nucleus are called homogeneous heteroenergetics.
4. Nuclides:Atoms with the same number of protons, neutrons, and energy states in the nucleus belong to the same nuclide.
5. Causes of nuclear decay:When there are too many or too few protons in the nucleus, or too many or too few neutrons, the nucleus becomes unstable, and the nucleus spontaneously emits rays that transform into another nuclide and release one or more rays at the same time.
6. Decay:The decay of the rays is emitted, and as a result, the nuclei are moved forward by two places in the periodic table.
7、-- Decay:Due to the relative surplus of electrons, a neutron is converted into a proton and emits a decay of rays, as a result of which the nucleus will be shifted back one place.
8. ++ decay:Due to the relative lack of electrons, a proton is converted into a neutron and emits a decay of rays, as a result of which the nucleus will move forward by one bit.
9. Decay:The nucleus of an atom moves from an excited state to a ground state by emitting photons to release excess energy.
10. Rays: A stream of positively charged, high-velocity particles, essentially helium nuclei.
11. Rays: A stream of negatively charged high-velocity particles, which are essentially negative electrons.
12. Ray:Uncharged flow of photons.
13. Ionization:When a charged particle passes through a substance, it reacts electrostatically with the electrons outside the nucleus of the atom of the substance, causing the electrons to detach from the atomic orbit and form free electrons.
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