The statement of half life distinguishes what the half life is related to

Of course, it's different, it's mainly a matter of different statistical probabilities:

According to the theory of quantum mechanics, for a nucleus, its decay is not predictable, we can only calculate the probability of its decay, for example, the decay probability of an element r is a%, and we can't say what the half-life of a nucleus is, but for a selected range of a large number of such substances, for example, 100g, think of Avogadro's constant 100g to contain hundreds of millions of nuclei, then the probability is mathematically very close to the frequency, It is also possible to predict how much 100g is left after a half-life.

Your question "how many grams of decay per hour", without a selected range, is meaningless, to give a simple example:

The half-life of the R element is 15 days, then 100gr after 15 days will leave 50g, according to the definition you gave, that is, 10 3g per day, but if there is a 1000gr substance after 15 days, there will be 500g left, an average of 100 3g per day, the two are not the same, so your former measurement is invalid, I hope you understand, if you still have questions, please add questions.

You can't know for sure how long it takes for a single nucleus to decay, but if there are a lot of them, you can get the density distribution of the decay time, using probability statistics.

Half-life is the time it takes for the number of atoms to decay to half of its original number, which is a matter of proportion.

How many grams decay per hour, and the total amount is not known.

There is a premise for how many grams of decay per hour per 100 grams of such substances, and the time it takes to decay to half can be calculated

Half-lifeIt has to do with the number of reaction sequences.

If it is a first-order reaction, then the half-life is a fixed value, which is related to its nature, etc. If the fruit is not first-class, then it is also related to its concentration. When a nuclide is determined, its half-life is determined.

The half-life of C12 is a fixed value and does not change due to changes in the environment.

The nature of the half-life is early:In addition, there are many factors that can also affect the half-life of the drug, such as the patient has heart disease.

Hemodynamic changes can lead to reduced blood flow in organs or in certain areas, which in turn will cause some drugs to be eliminated and prolong the half-life of drugs. If the patient has liver and kidney insufficiency, it will also affect the metabolism and elimination of the drug, which will prolong the half-life of the drug.

Half-lifeIt has to do with the number of reaction sequences.

If it is a first-order reaction, then the half-life is a fixed value, which is related to its nature, etc. If it is not first-order, then it is also related to its concentration. When a nuclide is determined, its half-life is determined.

The half-life of C12 is a fixed value and does not change due to changes in the environment.

Half-life Einstein's law.

When atoms begin to decay, their number decreases and the rate of decay slows down. For example, if the half-decay of an atom is one hour, after one hour the undecayed atom will be one-half of the original atom, two hours later it will be one-fourth, and after three hours it will be one-eighth of the atom.

The decay of the atom creates another element, which emits alpha particles.

Beta particles or neutrinos.

After decay, the atom also detects the absence and releases rays.

Quantities of radioactive elementsNucleus, half of the time it takes for decay to occur, is called the elementHalf-life

The half-life is statistically significant. The half-life is a period of time t, during which there is a 50% probability that the number of atoms of an unstable isotope will decay.

"50% probability" is a statistical concept that only makes sense for a large number of repetitive events. When the number of atoms is "huge", 50% of the atoms will decay in time t.

The half-life is calculated by the formula:

Starting from the definition of half-life, combine the proportional series.

Concept, we know that after n half-lives, the remaining mass is:

m=m(1/2)^(t/t)。

where m is the mass of the nucleus before the reaction, m is the mass of the nucleus after the reaction, t is the reaction time, and t is the half-life. Obviously, n=t t.

Overview:

1) Definition of half-life: Half of the nuclei of a radioactive element take time to decay, which is called the half-life of the element.

2) Significance of half-life: It reflects the statistical speed of the nuclear decay process.

3) The determining characteristic of half-life: it is determined only by the factors of the nucleus itself, and has nothing to do with the physical or chemical state of the atom.

The above content reference: Encyclopedia - Half-Life.

The four half-lives are defined as follows:

1. Chemically: only chemical reactions that conform to first-order kinetics have stable half-life data, and unlike nuclear decay, the half-life data of chemical reactions is not static, but will be affected by temperature factors.

2. In pharmacokinetics: the metabolic process of the drug in the body is carried out according to the first-order kinetic process, so the drug also has a relatively stable half-life in the body, which is called the drug elimination half-life or plasma half-grasp filial piety dissipation period, which is specifically defined as the time required for the concentration of the drug to drop by half in the organism.

3. In a statistical sense, the half-life refers to a period of time t, and the probability of decay of an unstable isotope atom of an element during the time period t is fifty percent, and fifty percent is a statistical concept, which is only meaningful for a large number of repeated events.

4. In physics: the half-life of a radioactive isotope refers to the time required for the radioactive atoms in a sample to decay to half of the original number, and the shorter the half-life, the more unstable the atoms, and the higher the chance of decay of each atom.

The four types of stupid hell half-lives are defined as follows:

1. Chemically: only chemical reactions that conform to the mechanics of the first-order dynamic belt hall have a stable half-life of several deniers, and unlike nuclear decay, the half-life data of chemical reactions is not static, but will be affected by temperature factors.

2. In pharmacokinetics: the metabolic process of the drug in the body is carried out according to the first-order kinetic process, so the drug also has a relatively stable half-life in the body, which is called the drug elimination half-life or plasma half-life, which is specifically defined as the time required for the concentration of the drug in the organism to drop by half.

3. In a statistical sense, half-life refers to a period of time t, in which the probability of decay of an unstable isotope atom of an element is fifty percent, and fifty percent is a statistical concept that is only meaningful for a large number of repetitive events.

4. In physics: the half-life of a radioactive isotope refers to the time required for the radioactive atoms in a sample to decay to half of the original number, and the shorter the half-life, the more unstable the atoms, and the higher the chance of decay of each atom.