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Alpha decay requires two protons and two neutrons. Hydrogen only has one proton.
The question is unclear. First before what? More likely to occur? I am going to assume the latter... Alpha decay is more likely to occur, when both alpha and beta are possible, because alpha decay removes more binding energy from the nuclide, and the tendency is to reduce energy as quickly as possible.
Because the less protons are in an atom the quicker it decays.
Radium-226--------------------Radon-222 + alpha
yes
Yes, but only if the nuclear disintegration is alpha decay. Alpha decay is only one mode of radioactive decay, and in alpha decay, a helium-4 nucleus (the alpha particle) will appear. Beta decay (two types) and spontaneous fission are also modes of radioactive decay, and different particles appear in those events. Links are provided below to Related questions that will help you sort this out.
The equation for the beta decay of 87Kr is: 3687Kr --> 3787Rb + -10e where -10e represents a negative beta particle or electron.
Gamma decay is the release of energy, but does not in itself change the nucleas Alpha decay is the loss of 2 protrons and 2 neutrons, lowering the atomic number by 2 and mass number by 4 Beta can occur as a result of a neutron turning into a protron, raising the atomic number by 1 and charge by 1
decay; alpha (helium nuclei), beta (electrons or positrons), or gamma (photons) are spontaneously ejected from unstable isotopesfission; very massive unstable isotopes split into two much lighter nuclei and a few neutrons are ejected, usually happens following capture of a neutron but in some isotopes can occur spontaneouslyfusion; very light nuclei merge forming heavier nuclei, can only occur at very high temperature and pressure
Any gas helps decay to occur.
1- 218 Po if emits one alpha and two beta particles it becomes 214 Po 2- 214 Po if emits one alpha and two beta particles it becomes 210 Po. This is all hypothetical.
These elements (neptunium and heavier) are called transuranic elements or trans-uranium elements. They could also properly be called artificial and radioactive.*Both plutonium and neptunium, first known through synthesis, have been found to occur naturally in trace amounts, along with americium, curium, berkelium and californium. These occur through a natural version of the synthesis process, within quantities of uranium ore.