What is the half-life of thorium-230?
75,380 years
Thirty-one radioisotopes have been characterized, with the most stable being 232Th, 230Th with a half-life of 75,380 years, 229Th with a half-life of 7,917 years, and 228Th with a half-life of 1.92 years.
What is half-life of the RA 226 radioisotopes?
1600 years
All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1600 years and decays into radon gas (specifically the isotope radon-222).
How long does it take for thorium to decay?
about 14 billion years
The time required for a radioactive substance to lose 50 percent of its radioactivity by decay is known as the half-life. The half-life of thorium- 232 is very long at about 14 billion years.
Is thorium 230 naturally occurring?
Thorium (chemical symbol Th) is a naturally occurring radioactive metal found at trace levels in soil, rocks, water, plants and animals. There are natural and man-made forms of thorium, all of which are radioactive. In general, naturally occurring thorium exists as Th-232, Th-230 or Th-228.
How is thorium 230 produced?
The thorium ores monazite, thorite, and thorianite are mined for the metal. Most thorium is natural, but thorium isotopes are produced by decay processes in nuclear reactors. 230. Th, t½ 75,400 years, and 228 Th, t½ 1.9 years, both by α decay with accompanying γ radiation, are environmentally important Th isotopes.
When the nuclide thorium-230 undergoes alpha decay The name of the product nuclide is?
radium-226
The name of the product nuclide is radium-226.
What is the decay rate K of radium-226?
A radioactive decay curve for radium-226, which has a half-life of approximately 1600 yr, is given in Figure 8.6. Half-lives of radioactive isotopes range from a few microseconds to as long as 1015 yr (Table 8.1)….8.6 Half-life.
| Isotopes | Half-life |
|---|---|
| 614C | 5770 yr |
| Natural radioisotopes | |
| 1910K | 1.3 × 109 yr |
| 60144Nd | 5 × 1015 yr |
What is the half life of radium-226?
The half-life of a radioactive element is the time it takes for half of its atoms to decay into something else. For example, the half-life of radium-226 is 1600 years (as indicated on the chart given above).
What is the half life of radiothorium-232?
It was once named Radiothorium, due to its occurrence in the disintegration chain of thorium-232. It has a half-life of 1.9116 years. It undergoes alpha decay to 224 Ra. Occasionally it decays by the unusual route of cluster decay, emitting a nucleus of 20 O and producing stable 208 Pb.
Which is the longest half life of thorium?
Thorium-232. Its decay chain is the thorium series eventually ending in lead-208. The remainder of the chain is quick; the longest half-lives in it are 5.75 years for radium-228 and 1.91 years for thorium-228, with all other half-lives totaling less than 5 days.
What kind of radiation does thorium 230 produce?
Thorium- 230 is typically present with its decay product radium- 226, and it is therefore a health risk from gamma radiation from radium-226 decay products, lung exposure from radon-222 gas and its decay products, and inhalation and ingestion exposure.