Alpha?rays are actually high speed?particles. Early researchers tended to refer to any form of energetic?radiation?as?rays, and the term is still used. An?alpha particleis made up of two protons and two neutrons, all held together by the same strong nuclear force that binds the nucleus of any atom.
71) ??-rays are
Answer is:
He nuclei
Explanation:
Related Atoms and Nuclei MCQ with Answers
Answer is:
electrons and electromagnetic radiation of wavelengths shorter than X-rays
Explanation:
??-rays and???-rays are respectively electrons and electromagnetic radiation of wavelengths shorter than X-rays
Answer is:
N(t)=N(0)e?\lambda t
Explanation:
Radioactivity:?Law of Radioactive Decay.?Radioactivity?is the phenomenon exhibited by the nuclei of an atom as a result of?nuclear?instability. It is a process by which the nucleus of an unstable atom loses energy by emitting?radiation.Radioactivity?was discovered by Henry Becquerel completely by accident.
Answer is:
the time in which N has been reduced to one-half of its initial value
Explanation:
The half-life?T1/2of a radionuclide is the time in which N has been reduced to one-half of its initial value
Answer is:
the time at which N has been reduced to?e?1of its initial value
Explanation:
The mean life t of a radionuclide is the time at which N has been reduced to?e?1of its initial value