What are 4 radioactive isotopes?
Radioactive isotopes of radium, thorium, and uranium, for example, are found naturally in rocks and soil. Uranium and thorium also occur in trace amounts in water. Radon, generated by the radioactive decay of radium, is present in air.
What is the half-life of an isotope quizlet?
Terms in this set (20) Half life is the time it takes for the number of nuclei in a radioactive isotope in a sample to halve.
What is a half-life simple definition?
half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive …
Why is radioactivity measured in half-lives?
The half-life of a radioactive substance is a characteristic constant. It measures the time it takes for a given amount of the substance to become reduced by half as a consequence of decay, and therefore, the emission of radiation. When it decays to stable nickel, it emits two relatively high-energy gamma rays.
Which is the best description of the half-life of a radioactive isotope quizlet?
The half-life of a radioactive isotope is the time required for one half-life of the initial mass to decay into a different element. The radioactive decay of iodine is shown on the graph.
What is the definition of a half-life quizlet geology?
What is the scientific definition of half-life? the amount of time over which the number of parent isotopes decreases by half. Two containers hold the same radioactive isotope.
What are 5 uses of radioactive isotopes?
Different chemical forms are used for brain, bone, liver, spleen and kidney imaging and also for blood flow studies. Used to locate leaks in industrial pipe lines…and in oil well studies. Used in nuclear medicine for nuclear cardiology and tumor detection. Used to study bone formation and metabolism.
What are examples of radioactive isotopes?
What are some commonly-used radioisotopes?
| Radioisotope | Half-life |
|---|---|
| Hydrogen-3 (tritium) | 12.32 years |
| Carbon-14 | 5,700 years |
| Chlorine-36 | 301,000 years |
| Lead-210 | 22.2 years |