After one half-life, 50% remain in the initial parent nuclei, 25% after two, and so on. The amount of radiation emitted by a radioactive source depends on both its half-life and the initial number of radioactive atoms present.
Atoms strive for stability, thus they release energy from their nucleus in the form of a particle or ray to achieve a more stable state.
The unstable atom is referred to as a radioactive atom, the process is known as radioactivity, and the energy emitted is radiation.
If these forces are out of balance or if the nucleus has an excessive amount of internal energy, an atom is unstable (radioactive).
An overabundance of neutrons or protons can make the nucleus of an atom unstable.
The initial parent nuclei still contain 50% of them after one half-life, 25% after two, and so on.
The half-life and the initial quantity of radioactive atoms present both affect how much radiation is produced by a radioactive source.
Therefore, after one half-life, 50% remain in the initial parent nuclei, 25% after two, and so on. The amount of radiation emitted by a radioactive source depends on both its half-life and the initial number of radioactive atoms present.
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