218Po (or polonium 218) is an isotope of polonium; 218 is the mass number of this isotope.
The exact mass is: 218,0089730(26); the half life of this isotope is 3,10(1) minutes.
Polonium-218 undergoes alpha decay to form lead-214, which then undergoes beta decay to form bismuth-214.
Polonium 210-----------alpha particles-----------Lead 206 Polonium 209-----------alpha particles-----------Lead 205 Polonium 208-----------alpha particles-----------Lead 204 Polonium 214-----------alpha particles-----------Lead 210 Polonium 218-----------alpha particles-----------Lead 214 (99,98 %) Polonium 218-----------beta particles------------Astatin 218 (o,o2 %) For other isotopes see the list at: http://en.wikipedia.org/wiki/Polonium#Isotopes
Some applications of polonium:- polonium-beryllium neutron sources- neutron source for nuclear weapons (also mixed with beryllium)- radioactive heat source- devices for the elimination of dust from textilesIt can be alloyed with beryllium to provide a source of neutrons. It can eliminate static charges in textile mills.It is used on brushes to clean film, and can provide thermoelectric power in space satellites.Of course, it can also be used as a poison, as it is over 250,000 times as toxic as cyanide, and is very hard to find in a body.
Two polonium oxides are known: PoO2 and PoO3.
The valences of polonium are 2, 4 and 6.
Polonium-218 is radioactive.
Polonium-218 decay to lead-214.
Polonium-218 undergoes alpha decay to form lead-214, which then undergoes beta decay to form bismuth-214.
Polonium 210-----------alpha particles-----------Lead 206 Polonium 209-----------alpha particles-----------Lead 205 Polonium 208-----------alpha particles-----------Lead 204 Polonium 214-----------alpha particles-----------Lead 210 Polonium 218-----------alpha particles-----------Lead 214 (99,98 %) Polonium 218-----------beta particles------------Astatin 218 (o,o2 %) For other isotopes see the list at: http://en.wikipedia.org/wiki/Polonium#Isotopes
The beta minus decay of polonium isotopes is extremely rare. Beta decay involve the increase of the atomic number with 1.Example: Po-218----------------beta minus---------------At-218
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The nucleus of a polonium-218 atom contains 84 protons and 134 neutrons, while the nucleus of a radon-222 atom contains 86 protons and 136 neutrons. This difference in the number of protons and neutrons results in different nuclear properties and stability for each atom.
Radon-222 undergoes alpha decay to produce polonium-218as a daughter.
The symbol Po-210 represents the isotope of Polonium with a mass number of 210.
Some applications of polonium:- polonium-beryllium neutron sources- neutron source for nuclear weapons (also mixed with beryllium)- radioactive heat source- devices for the elimination of dust from textilesIt can be alloyed with beryllium to provide a source of neutrons. It can eliminate static charges in textile mills.It is used on brushes to clean film, and can provide thermoelectric power in space satellites.Of course, it can also be used as a poison, as it is over 250,000 times as toxic as cyanide, and is very hard to find in a body.
When astatine-218 undergoes alpha decay, it emits a helium nucleus (alpha particle) and transforms into the new element, polonium-214. This process reduces the atomic number of the nucleus by 2 and the mass number by 4.
The correct equation for the alpha decay of Polonium-214 is: 218/84Po -> 214/82Pb + 4/2He This shows the decay of Polonium-214 into Lead-214 and a Helium nucleus, where the atomic number and mass numbers are conserved.