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Magnesium-25
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium
Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low melting point and high chemical reactivity. Like the other alkaline earth metals (group 2 of the periodic table) it occurs naturally only in combination with other elements and it almost always has an oxidation state of +2. It reacts readily with air to form a thin passivation coating of magnesium oxide that inhibits further corrosion of the metal. The free metal burns with a brilliant-white light. The metal is obtained mainly by electrolysis of magnesium salts obtained from brine. It is less dense than aluminium and is used primarily as a component in strong and lightweight alloys that contain aluminium. In the cosmos, magnesium is produced in large, aging stars by the sequential addition of three helium nuclei to a carbon nucleus. When such stars explode as supernovas, much of the magnesium is expelled into the interstellar medium where it ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-27
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-39
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-38
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-37
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-36
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-35
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-34
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-33
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-32
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium-31
Magnesium (12Mg) naturally occurs in three stable isotopes: , , and . There are 19 radioisotopes that have been discovered, ranging from to . The longest-lived radioisotope is with a half-life of . The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is proton-unbound with a half-life of , though the half-life of similarly unbound has not been measured. List of isotopes , - , , style="text-align:right" , 12 , style="text-align:right" , 6 , , , 2p , , 0+ , , , - , , style="text-align:right" , 12 , style="text-align:right" , 7 , , , 2p , , 1/2−# , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 12 , rowspan=2 style="text-align:right" , 8 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, 0+ , rowspan=2, , rowspan=2, , - , β+p () , , - , rowspan=4, , rowspan=4 style="text-align:right" , 12 , rowspan=4 style="text-align:r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neutron Emission
Neutron emission is a mode of radioactive decay in which one or more neutrons are ejected from a nucleus. It occurs in the most neutron-rich/proton-deficient nuclides, and also from excited states of other nuclides as in photoneutron emission and beta-delayed neutron emission. As only a neutron is lost by this process the number of protons remains unchanged, and an atom does not become an atom of a different element, but a different isotope of the same element. Neutrons are also produced in the spontaneous and induced fission of certain heavy nuclides. Spontaneous neutron emission As a consequence of the Pauli exclusion principle, nuclei with an excess of protons or neutrons have a higher average energy per nucleon. Nuclei with a sufficient excess of neutrons have a greater energy than the combination of a free neutron and a nucleus with one less neutron, and therefore can decay by neutron emission. Nuclei which can decay by this process are described as lying beyond the neutron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
