Question on Atomic Decay What is the decay of an atomic nucleus?

Half-life is actually a time with a 50% probability of occurrence.

There is no reason why the atom decays and who does not, it is a matter of probability. Let me give you some hypotheses to illustrate that there is a certain probability of atomic decay, such as one atom decaying 10% in one day and another atom decaying 5% in one day. And we use half-life as the time it takes for 50% decay to occur.

Therefore, a long half-life can be understood as a low probability of decay.

Of course, the half-life is for a large number of atoms, and if there are only 20 atoms, it is not necessarily that there are only 10 left after a half-life.

This is a more technical question. The decay of the nucleus is a statistically correct problem (this is the core), as I think of as a matter of probability. As for the half-life, it is an amount artificially prescribed by people in order to better understand the natural law of radioactive decay, and after stipulating, it is found that it can indeed help people solve many problems, so this concept is followed.

Because the number of nuclei relative to macroscopic matter is quite huge, it makes no sense to say that there are a few, or that a few nuclei have decayed. Even if it decays, it is not detected by human detectors, and it has no meaning.

So it's not very clear about the mechanism of nuclear decay itself, i.e., why the nucleus decays according to the exponential law. But this is the law of nature, and carbon 14 is no exception, that is, the existence time of an organism can be deduced by measuring the amount of carbon 14 in the organism after many years, and the law of the ampere index. It's not that it takes thousands of years to emit a single particle.

The focus is on the huge number of nuclei, the ...... that conform to statistical laws

Hope you understand ......

Huh

Half-life refers to the time elapsed by a certain number of radioisotope atoms from no decay to the decay of half of these atoms, which is a macroscopic concept, if the interval between the decay of one (batch) atom and the decay of the next (batch) atom is long, then the whole half-life is very long. There is no fixed order for atomic decay.

1. Decay: The decay of particles emitted by the nucleus of an atom is called decay.

azx→a−4z−2y+42he

Decay pass (the case where a particle is emitted).

2. Decay: The decay of particles emitted by the nucleus of an atom is called decay.

azx→az+1y+0−1e

Decay pass (the case where a particle is emitted).

The electron produced in decay is the conversion of a neutron in the nucleus into a proton and an electron, and the conversion equation is as follows:

10n→11h+0−1e

The nucleus of an atom emits a particle or particle, and since the number of nuclear charges changes, its position in the periodic table changes, changing into another nucleus. We call the change in the transformation of the nucleus into a new nucleus due to the release of some kind of particle as the decay of the nucleus.

The interior of the nucleus is not as calm as water, on the contrary, it is full of various forces. Due to same-sex repulsion, the electromagnetic force has been trying to separate the positively charged protons in the nucleus, and the strong interaction force has the effect of merging the protons and neutrons in the nucleus, while the weak interaction force has been looking for opportunities to convert the neutrons and protons into each other.

The nucleus of an atom emits several protons or neutrons, thus becoming another nucleus.

There is decay: the release of rays, i.e., helium nuclei, i.e., two protons and two neutrons.

Decay: A neutron becomes a proton and an electron and an electron-type antineutrino, and the electron emitted is called a ray.

Radioactive contamination is when the level of radioactivity of radioactive material in the environment is higher than the natural background or exceeds the prescribed health standards. Radioactive contaminants mainly refer to various radionuclides, which have nothing to do with the chemical state, and each radionuclide can emit rays of a certain energy. After radionuclides are discharged into the environment, they cause pollution to the atmosphere, water and soil, and can be enriched by organisms, so that the radionuclides in some animals and plants, especially some aquatic organisms, can increase many times higher than those in the environment.

There are two types of radionuclides in the environment: natural and man-made. The presence of naturally occurring radioactive materials such as uranium, thorium and potassium-40 in the human environment, plus cosmic radiation, a person is exposed to about 100 millirem of radioactive radiation every year, which is called natural background radiation. The anthropogenic fallout is mainly produced by nuclear ** tests, which amounted to 337 trillion tons in 1961 and 1962 alone, causing global environmental pollution, and other such as the extraction and processing of nuclear fuel, the leakage of nuclear reactors, and the reprocessing of nuclear fuel have aggravated the radioactive pollution of the environment.

It is very easy to cause embryonic death or teratogenesis.

Radioactive pollution is very harmful to the health of the population, so it is necessary to strengthen the management of the treatment and discharge of various radioactive "three wastes", formulate radioactive protection standards, and strengthen the monitoring of radioactive materials, so as to reduce the radioactive pollution of the environment. In addition, personal protection should be strengthened, as far away from radioactive sources as possible, and protective clothing should be worn if necessary.

The daughter nucleus is composed of protons and neutrons, they will interact, it will produce force, there will be potential energy, some particles in the nucleus may be in a higher energy state, it will be unstable, it will change to a low energy state, the nucleus will become the nucleus of other atoms. This is where the decay occurs.

The change in which the nucleus of an atom is placed after a particle or particle and becomes a new nucleus is called the decay of the nucleus. Both the charge number and the mass number are conserved when the nucleus decays. The decay of particles released during decay is called decay The decay of particles released during decay is called decay, and its essence is the conversion of neutrons into protons and electrons in the nucleus.

Half of the nucleus of a radioactive element takes time to decay is called the half-life of the element, which is denoted by t, i.e., t t m (remainder) = m (original) (1 2) (t represents the elapsed time). The half-life is determined by the internal factors of the nucleus of the radioactive element and has nothing to do with the physical or chemical state in which the atom is located.

Decay can produce a helium nucleus, decay is the decomposition of neutrons in the nucleus into an electron and a proton, which can produce a particle, which is an electron, and the transition energy in the decay nucleus can radiate a particle, which is a photon.

There is also a shell structure inside the nucleus like the electrons outside the nucleus, and when the energy level of the nucleus is high, it will transition, and then decay will occur.

Not radioactive elements, most spontaneously undergo a series of changes, ion collision trajectories several times to acquire different chemical properties. The uranium element has undergone 14 changes in this way, during which it has undergone elemental forms such as uranium, radium, radon, complement and lead. 6 of the 14 changes were radiated and particles; Another 8 times of emitting particles.

For each particle emitted by a changing atom (atomic weight 4), the original atomic weight decreases by 4. The atomic weight of uranium is 238, the atomic weight of radium is 226, and the atomic weight of the final product lead is 2O6.

No.

Atomic decay is precisely "nuclear decay", that is, the nucleus of an atom spontaneously emits out particles or other particles and transforms into other particles.

The nuclear energy of the atom can spontaneously emit particles and undergo a transformation, which is called decay, and so on. The mass of the atomic nucleus that can decay is generally greater than 140, and the decay can generally indicate that the nucleus is unstable, so the emitted particles remain stable.

And annihilation is another concept, the positive and antimatter meet to produce annihilation, generally there are photons and other particles, then the energy is transferred to these particles, Einstein's mass-energy equation points out that energy and mass can be exchanged, so the matter does not disappear, but is converted to other matter, which is called conservation.

If you are interested, you can look for "Nuclear Physics" to take a look, some things in physics are definitive, it's not that you don't understand, but your sister has been exposed to it, and you understand it as soon as you read it, don't think too much.

In decay, the mass number of the nucleus does not change, but the number of charges changes by one unit. Reaction equation: 14N+4He 17O+1H), reaction formula guessing formula: 9BE+4HE 12C+N).

Decay is the release of helium nuclear particles, decay is the release of electrons, nuclear fission is the transformation of one variety, such as uranium-238 decay, nuclear fusion is more changeable, such as hydrogen bombs and artificial conversion of atomic nuclei is to artificially promote reactions, such as atomic bombardment.

In decay, the mass number of the nucleus does not change, but the number of charges changes by one unit. Reaction equation: 14N+4He 17O+1H), reaction formula guessing formula: 9BE+4HE 12C+N).

Decay is the release of helium nuclear particles, decay is the release of electrons, nuclear fission is the transformation of one variety, such as uranium-238 decay, nuclear fusion is more changeable, such as hydrogen bombs and artificial conversion of atomic nuclei is to artificially promote reactions, such as atomic bombardment.

Of course, this chaotic spine is known as the so-called "decay", which is the decay of the atomic nucleus that releases electrons (bumper particles), and its decay equation is:

Its essence is equivalent to the process of a neutron inside the nucleus of an atom decaying into a proton, releasing an electron and energy at the same time.