Radon is a gas, possible to be in buildings. Radon 222 is an isotope of radon, the most common.
When Radium-226 decays to form Radon-222, the Radium nucleus emits an alpha particle. The atomic number goes down by 2, and the mass number goes down by 4, matching the atomic number and mass number of the alpha particle.
In the case of Rn-222, which is the "isotope of concern" because it occurs naturally, it decays as follows: 222Rn => 218Po + He+2 In this equation, we see the radon isotope Rn-222 emit an alpha particle (the helium nucleus) and undergo a transformation to become the polonium isotope, Po-218.
The hyphen notation for Radon is Rn-222.
Radon-222 undergoes alpha decay to produce polonium-218as a daughter.
The element with an atomic mass of 222 amu is radon (Rn).
radon 222
When radium-226 decays to form radon-222, the radium nucleus emits a alpha particle.
Radium 226--------alpha particle-------- Radon 222
When Radium-226 decays to form Radon-222, the Radium nucleus emits an alpha particle. The atomic number goes down by 2, and the mass number goes down by 4, matching the atomic number and mass number of the alpha particle.
In the case of Rn-222, which is the "isotope of concern" because it occurs naturally, it decays as follows: 222Rn => 218Po + He+2 In this equation, we see the radon isotope Rn-222 emit an alpha particle (the helium nucleus) and undergo a transformation to become the polonium isotope, Po-218.
The hyphen notation for Radon is Rn-222.
Radon-222 undergoes alpha decay to produce polonium-218as a daughter.
First, you figure out how many protons and neutrons Radon-222 has. Find the atomic number - that's the number of protons. Subtract that from 222 to get the number of neutrons.From that, you subtract an alpha particle - i.e., 2 protons and 2 neutrons. Use the number of protons to look up the element. Add protons and neutrons to get the isotope number. As an alternative, since you don't really need the number of neutrons, you can just subtract 2 protons, and a total of 4 nucleids from the parent nucleus.
The element with an atomic mass of 222 amu is radon (Rn).
Radium 226 decays by alpha emission to Radon 222. A helium nucleus is emitted by alpha emission which makes the mass reduce by 4 and its atomic number by 2.
Radium-226 does not decay by beta decay. It decays by alpha decay to radon-222.
Radon is the only naturally occurring radioactive inert gas. Its most stable isotope, radon-222, decays through alpha particle emission. It is produced as a decay product of uranium and thorium in the Earth's crust.