A radio-isotope.
process of unstable atoms trying to become stable by emitting energy that is at a level high enough to ionize
Whilst the members of group 1 are certainly very reactive, it's not accurate to say they are 'unstable' which has many meanings, but requires us to say what it's unstable to. They are reactive because of several factors, including the low ionization energy of the metals and the high lattice energy of the compounds formed.
It is the process of Radioactivity.
Unstable nuclei release energy in the form of radiation. Types of radiation released include alpha particles (He nuclei), beta particles (e-), and high energy gamma waves.
Ambient heat
This is a radioactive isotope.
A radio-isotope.
Radioactive decay
Gamma rays.
process of unstable atoms trying to become stable by emitting energy that is at a level high enough to ionize
a very unstable element made by high-energy atomic collisions.
A radioisotope is an atom that has an unstable nucleus characterized by excess energy.
the absorbing material becomes unstable
energy and fast-moving particles are released,
Please see the answer at the related question below.
Nucleus