Examples of elements with doubly magic nuclei are \(^4_2 \textrm{He}\), with 2 protons and 2 neutrons, and \(^{208}_{82} \textrm{Pb}\), with 82 protons and 126 neutrons, which is the heaviest known stable isotope of any element.

Of the known chemical elements, 80 elements have at least one stable nuclide. These comprise the first 82 elements from hydrogen to lead, with the two exceptions, technetium (element 43) and promethium (element 61), that do not have any stable nuclides. As of 2024, there are total of 251 known "stable" nuclides.

Overall, there are 251 known stable isotopes in total. Atomic nuclei consist of protons and neutrons, which attract each other through the nuclear force, while protons repel each other via the electric force due to their positive charge. These two forces compete, leading to some combinations of neutrons and protons being more stable than others.

2024年7月23日 · The most stable atomic nucleus is nickel-62 in its ground state. This is because nickel-62 has the highest binding energy per nucleon of any type of nucleus. There are 28 protons and 34 neutrons in a nickel-62 nucleus, for a total of 62 nucleons. Books and websites often say that iron is the most stable nucleus, but this is simply not true.

Examples of elements with doubly magic nuclei are \(^4_2 \textrm{He}\), with 2 protons and 2 neutrons, and \(^{208}_{82} \textrm{Pb}\), with 82 protons and 126 neutrons, which is the heaviest known stable isotope of any element.

For example, the double beta emitter 116. has a half-life of 2.9 × 1019 years. This makes for a larger number of stable even–even nuclides, with some mass numbers having two stable nuclides, and some elements (atomic numbers) having as many as seven.

2025年1月15日 · Stable nuclei have a balanced ratio of protons and neutrons. Three examples of stable atoms include Carbon, Oxygen, and Neon, each with equal numbers of protons and neutrons. Drawing their nuclei illustrates this stability visually. To find stable atoms, we need to look at the number of protons and neutrons in their nuclei.

For example, helium-4 is among the most abundant (and stable) nuclei in the universe. The stable elements at the end of the decay series all have a “magic number” of neutrons or protons. The nuclei He-4, O-16, and Pb-208 (82 protons and 126 neutrons) that contain magic numbers of both neutrons and protons are particularly stable.

2024年12月17日 · The atomic nucleus is the central core of an atom, consisting of positively charged protons and neutral neutrons, held together by strong nuclear forces. It determines the element's identity and stability, with isotopes varying in …

2022年9月20日 · What are stable nuclei examples? Nuclei with magic numbers of both protons and neutrons are said to be “doubly magic” and are even more stable. Examples of elements with doubly magic nuclei are 42He, with 2 protons and 2 neutrons, and 20882Pb, with 82 protons and 126 neutrons, which is the heaviest known stable isotope of any element.