Radioisotopes are identified by the halflife, type of radiations emitted, energy of these radiations, spectrometry (mass, gamma, alpha), etc.
Isotopes are identified by their mass numbers.
radio-isotopes
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Radio active isotopes are unstable isotopes of an element as there neutron number degenerate by emission of light or medium.
Francium.
Isotopes are identified based on their mass number, which is the sum of the number of protons and neutrons in the nucleus of an atom. This information can be obtained through techniques such as mass spectrometry or by analyzing the atomic mass of an element, which is a weighted average of the masses of its isotopes.
Isotopes in a sample can be identified by using techniques such as mass spectrometry or nuclear magnetic resonance spectroscopy, which can differentiate between isotopes based on their mass or magnetic properties.
Technetium has no stable isotopes but at least 30 artificial ones have been identified.
killer to any one
All radio-actives isotopes disappear by radioactive decay.
There are a lot more than 2 radio active isotopes... To answer this question a naturally or created radioactive element needs to be mentioned.
The use of nuclear energy in civilian society is to generate electricity. In the military it is to make bombs (and hopefully not use them). There are also some uses in medicine where radio isotopes can be used for diagnosis and treatment. These isotopes are produced by irradiation in low power reactors which enable short lived radio isotopes to be obtained as required.