Radioisotopes
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- Category: Science
- Date Submitted: 11/18/2012 12:18 AM
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Distinguish between a radioactive & a stable isotope.
Isotopes are defined as forms of the same chemical element that have different atomic masses which is due to a varied number of neutrons. Those isotopes that do not undergo radioactive decay are called stable isotopes (mass remains the same & nuclei are stable) and those isotopes that do undergo radioactive decay are called radioactive isotopes (mass changes and nuclei is unstable which decays) and emit a particle (alpha/beta) or energy (gamma)
A nucleus is said to be unstable when:
* Its atomic number is greater than 83 (from bismuth onwards)
* If its ratio of neutrons to protons places it outside the zone of stability.
A nucleus is said to be unstable when:
* Its atomic number is greater than 83 (from bismuth onwards)
* If its ratio of neutrons to protons places it outside the zone of stability.
Describes conditions under which a nucleus is unstable
Identifies isotope and gives its symbol
Technetium-99m Symbol
Technetium-99m Symbol
Cobalt-60 Symbol
Cobalt-60 Symbol
Cobalt-60 is a radioisotope of Cobalt and it is used widely in various industries, such as sterilising medical equipment and in industrial radiography. Technetium-99m is used in the medical diagnosis of patients with severe diseases such as cancer in the body.
Describe how isotope is produced
2759Co + 01n 2760Co +
2759Co + 01n 2760Co +
Cobalt-60 has to be produced artificially due to its short half-life of 5.26 years. In order to make it, a slow source of neutrons bombards a section of Cobalt-59 usually through water, which slows the neutrons down. It can also be produced in nuclear reactors such as the CANDU reactor, where the control rods are made of Cobalt-59. The resulting product is Cobalt-60.
Technetium-99m Generator Source: www.technetium.org
Technetium-99m Generator Source: www.technetium.org
4299Mo -10e + 4399m Te
4299Mo -10e + 4399m Te
Technetium-99m...
Isotopes are defined as forms of the same chemical element that have different atomic masses which is due to a varied number of neutrons. Those isotopes that do not undergo radioactive decay are called stable isotopes (mass remains the same & nuclei are stable) and those isotopes that do undergo radioactive decay are called radioactive isotopes (mass changes and nuclei is unstable which decays) and emit a particle (alpha/beta) or energy (gamma)
A nucleus is said to be unstable when:
* Its atomic number is greater than 83 (from bismuth onwards)
* If its ratio of neutrons to protons places it outside the zone of stability.
A nucleus is said to be unstable when:
* Its atomic number is greater than 83 (from bismuth onwards)
* If its ratio of neutrons to protons places it outside the zone of stability.
Describes conditions under which a nucleus is unstable
Identifies isotope and gives its symbol
Technetium-99m Symbol
Technetium-99m Symbol
Cobalt-60 Symbol
Cobalt-60 Symbol
Cobalt-60 is a radioisotope of Cobalt and it is used widely in various industries, such as sterilising medical equipment and in industrial radiography. Technetium-99m is used in the medical diagnosis of patients with severe diseases such as cancer in the body.
Describe how isotope is produced
2759Co + 01n 2760Co +
2759Co + 01n 2760Co +
Cobalt-60 has to be produced artificially due to its short half-life of 5.26 years. In order to make it, a slow source of neutrons bombards a section of Cobalt-59 usually through water, which slows the neutrons down. It can also be produced in nuclear reactors such as the CANDU reactor, where the control rods are made of Cobalt-59. The resulting product is Cobalt-60.
Technetium-99m Generator Source: www.technetium.org
Technetium-99m Generator Source: www.technetium.org
4299Mo -10e + 4399m Te
4299Mo -10e + 4399m Te
Technetium-99m...