What part of the atom is involved when an atom decays?
Really, it is the whole thing.
An atom decays because the nucleus is unstable. The nucleus contains protons and neutrons, and only certain combinations of the numbers of each are stable.
When a radioactive atom decays, it can do a number of different things. Best known by ordinary people, possibly, is nuclear fission, in which the whole atom breaks apart to become two atoms. In the process various pieces of the atom also are released.
Sometimes an atom decays by emitting an alpha particle, which means that two neutrons and two protons, combined in a single package, are emitted. This also implies that two electrons are somehow lost. In the process, the atom changes to a different element, with an atomic number reduced by two, and with an isotope number reduced by four.
Sometimes an atom undergoes a beta-negative emission. This means that the number of electrons and protons in the atom is increased by one, but the number of neutrons is reduced.
Sometimes an orbital electron is captured, to combine with a proton in the nucleus to make a neutron. When this happens, the atomic number is reduced by one, so the atom is of a different element, but the isotope remains the same.
There is a type of decay called an "isomeric transition," in which an atom emits a gamma ray (type of photon) but keeps both its atomic number and its isotope number. The notation of the isotope number before the has an "m" attached (indicating an excited meta state), which is gone after the transition has taken place. For example, zinc-69m decays to zinc-69.
These are just examples illustrating how the whole atom is affected. There are a number of others.
An excited atom decays to its ground state and emits a photon of green light if instead the atom decays to an intermediate state then what color light is emitted?
An excited atom decays to it's ground state and emits a proton of green light if instead the atom decays to an intermediate state what could the light emitted be?
If an atom that emits a green proton when it decays to its ground state decays to an intermediate state instead it will emit a proton that is yellow/orange/red. The reason is that it will be a lower energy proton emitted and lower energy waves correspond to longer wavelengths like the ones that make up these colors.
An atom decays to its ground state and emits a photon of green light if the atom decays to an intermediate state what light would be emitted?
The part where ozone naturally decays to an oxygen molecule and an oxygen atom, either due to it being unstable or encountering another ozone molecule. Chlorine (from the CFC, or chloromethane) ties up the oxygen atom, and so it (and the energy it required to break loose) is unavailable to form another ozone molecule.
Though the electron itself is not present in the nucleus of an atom, the elementary particles that make up the electron are present inside the neutron. In other words, a neutron is made up of an electron and a proton. How do we know this? Because when a neutron decays, it slowly decays into a proton and an electron. It's a cycle.
Why could Galileo's thought experiment about the ball rolling forever on a level surface could only be a though experiment?
Why does an atom that decays by emitting alpha or beta radiation become an atom of a different element?
Alpha radiation is when the nucleus of an unstable element releases an alpha particle (two protons and two neutrons; the equivalent of the nucleus of a helium atom)due to the weak nuclear force. The resulting atom is now a different element because the number of protons it has determines which element it is. Beta radiation (β− ) is when a neutron in an unstable atom with an excess of neutrons turns into a proton because…