What is the decay equation for iodine 131?

Iodine-131 is a beta emitter commonly used in nuclear medicine. The equation for its decay is: Note that both the charge and the mass are balanced and that iodine-131 emits both a gamma ray and a beta particle….

Radiation emitted	Change in Atomic number	Change in Mass number
gamma ray	0	0

What is the beta decay of iodine 131?

As an example, iodine-131 is a radioisotope with a half-life of 8 days. It decays by beta particle emission into xenon-131….10.3: Half-Life.

Nuclide	Half-Life (t1/2)	Decay Mode
Cobalt-60	5.27 years	β−
Francium-220	27.5 seconds	α
Hydrogen-3	12.26 years	β−
Iodine-131	8.07 days	β−

What is the beta decay of cesium-137?

barium-137
Caesium-137 is a man-made radioactive isotope with a half-life of 32 years. It decays via β decay into barium-137. Of these decays 94.6 % lead to a metastable excited state of barium, Ba-137m, which passes into the ground state with a half-life of 156 s, whereby a γ quantum of 661.6 keV is emitted.

What is the nuclear decay equation?

Average number of radioactive decays per unit time (rate) • or – Change in number of radioactive nuclei present: A = -dN/dt • Depends on number of nuclei present (N). During decay of a given sample, A will decrease with time.

How do you calculate decay activity?

One of the applications of radioactive decay is radioactive dating, in which the age of a material is determined by the amount of radioactive decay that occurs. The rate of decay is called the activity R: R=ΔNΔt. The SI unit for R is the becquerel (Bq), defined by 1Bq=1decay/s.

How do you calculate atomic decay?

Radioactive decay law: N = N.e-λt The rate of nuclear decay is also measured in terms of half-lives. The half-life is the amount of time it takes for a given isotope to lose half of its radioactivity. If a radioisotope has a half-life of 14 days, half of its atoms will have decayed within 14 days.