Pls, i want to know more about half life.

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<h2>Nuclear Decay and Conservation Laws</h2>
<p>Nuclear <strong>decay</strong> has provided an amazing window into the realm of the very small. Nuclear decay gave the first indication of the connection between mass and energy, and it revealed the existence of two of the four basic forces in nature. In this topic, we explore the major modes of nuclear decay; and, like those who first explored them, we will discover evidence of previously unknown particles and conservation laws.</p>
<p>Some nuclides are stable, apparently living forever. Unstable nuclides decay (that is, they are radioactive), eventually producing a stable nuclide after many decays. We call the original nuclide the <strong>parent</strong> and its decay products the <strong>daughters</strong>. Some radioactive nuclides decay in a single step to a stable nucleus. For example, \({}^{\text{60}}\text{Co}\) is unstable and decays directly to \({}^{\text{60}}\text{Ni}\), which is stable. Others, such as \({}^{\text{238}}\text{U}\), decay to another unstable nuclide, resulting in a <strong>decay series</strong> in which each subsequent nuclide decays until a stable nuclide is finally produced.</p>
<p>The decay series that starts from \({}^{\text{238}}\text{U}\) is of particular interest, since it produces the radioactive isotopes \({}^{\text{226}}\text{Ra}\) and \({}^{\text{210}}\text{Po}\), which the Curies first discovered (see <a href="#navlink_id1930472">this figure</a>). Radon gas is also produced (\({}^{\text{222}}\text{Rn}\) in the series), an increasingly recognized naturally occurring hazard. Since radon is a noble gas, it emanates from materials, such as soil, containing even trace amounts of \({}^{\text{238}}\text{U}\) and can be inhaled. The decay of radon and its daughters produces internal damage. The \({}^{\text{238}}\text{U}\) decay series ends with \({}^{\text{206}}\text{Pb}\), a stable isotope of lead.</p>
<div class="fig_container" id="navlink_id1930472"><img alt="A graph is shown in which decay of alpha and beta is shown. Also half lives of each isotope are shown. Uranium decays in one mode but some isotopes decay by more than one mode. Finally a stable isotope of lead results." src="https://data.ulearngo.com/assets/c7209f50-0c6d-48df-8384-9a95ac45b7e4"/>
<p class="fig_caption">The decay series produced by \({}^{\text{238}}\text{U}\), the most common uranium isotope. Nuclides are graphed in the same manner as in the chart of nuclides. The type of decay for each member of the series is shown, as well as the half-lives. Note that some nuclides decay by more than one mode. You can see why radium and polonium are found in uranium ore. A stable isotope of lead is the end product of the series.</p>
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<p>Note that the daughters of \(\alpha \) decay shown in <a href="#navlink_id1930472">this figure</a> always have two fewer protons and two fewer neutrons than the parent. This seems reasonable, since we know that \(\alpha \) decay is the emission of a \({}^{4}\text{He}\) nucleus, which has two protons and two neutrons. The daughters of \(\beta \) decay have one less neutron and one more proton than their parent. Beta decay is a little more subtle, as we shall see. No \(\gamma \) decays are shown in the figure, because they do not produce a daughter that differs from the parent.</p>
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Physics is a science discipline concerned with the nature and properties of matter and energy. Physics topics include mechanics, heat, light and radiation, sound, electricity, magnetism, the structure of atoms, and so on.

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Nuclear Decay and Conservation Laws

Discover the principles behind nuclear physics and radioactivity, including the substructure of the nucleus, nuclear decay, and conservation laws, as well as practical applications in human and medical fields.


Nuclear Decay and Conservation Laws

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