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Naturally occuring Radon gas decays by alpha particle emission. However, many of the decay chain products have very short half lives, of which some decay by alpha particle emission and others by beta particle emission.
Alpha or an He nucleus because it has a mass of 4 when all the others have a mass of close to zero.
I believe that is called "Alpha Emission".
100Fm254 .........> 98Cf250 + 2He4
Both have 2 protons and 2 neutrons
Emission of an alpha particle.
Alpha emission means that an alpha particle (2 protons + 2 neutrons) are emitted, so the original nucleus has 2 protons and 2 neutrons more.
Alpha emission is a 4helium nucleus, which behaves like a particle. Beta emission is an electron, which behaves like a particle. Gamma emission is a photon, which behaves like a particle. Experiments can also be set up to show their wavelike properties (for alpha, beta, and gamma radiation).
"Common types of nuclear radiation include alpha particles, beta particles, and gamma rays"SourceFrank, David V., Michael Wysession, and Sophia Yancopoulos. "Chapter 10.1." Physical Science. Needham, MA: Prentice Hall, 2009. 1-715.
Naturally occuring Radon gas decays by alpha particle emission. However, many of the decay chain products have very short half lives, of which some decay by alpha particle emission and others by beta particle emission.
The heaviestis the alpha particle.
alpha particles.
A Geiger counter, also called a Geiger-Müller counter, is a type of particle detector that measures ionizing radiation. They detect the emission of nuclear radiation: alpha particles, beta particles or gamma rays. A Geiger counter detects radiation by ionization produced in a low-pressure gas in a Geiger-Müller tube
Generally this is called nuclear fission. In the special case where one of the new particles produced is a Helium-4 nucleus (2 protons, 2 neutrons) the process is radioactive decay and specifically alpha emission. (The He-4 nucleus is called an alpha particle, as it was the first such particle recognized. A beta particle is an electron emitted from the nucleus with the conversion of a neutron to a proton = beta emission.)
An alpha particle in nuclear chemistry is a helium-4 nucleus, or 42He+2. In order to simplify, the Greek letter alpha is also used to represent the particle.
Alpha or an He nucleus because it has a mass of 4 when all the others have a mass of close to zero.
231Pa---------alpha particle----------227Ac