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What are radioactive elements simple definition?

What are radioactive elements simple definition?

Radioactive elements are made up of atoms whose nuclei are unstable and give off atomic radiation as part of a process of attaining stability. The emission of radiation transforms radioactive atoms into another chemical element, which may be stable or may be radioactive such that it undergoes further decay.

What elements only have radioactive isotopes?

A good example of this is tritium, a radioactive isotope of hydrogen naturally present at extremely low levels….Radioactive Elements.

Element Most Stable Isotope Half-life of Most Stable Isotope
Promethium Pm-145 17.4 years
Polonium Po-209 102 years
Astatine At-210 8.1 hours
Radon Rn-222 3.82 days

What are radioactive isotopes explain with example?

Some isotopes have unstable atomic nuclei that undergo radioactive decay. These isotopes are radioactive in nature and are, therefore, known as radioisotopes (or radionuclides). Examples of radioactive isotopes include carbon-14, tritium (hydrogen-3), chlorine-36, uranium-235, and uranium-238.

Why are the isotopes of some elements radioactive?

The nuclei of radioisotopes are unstable, so they constantly decay and emit radiation. In elements with more than 83 protons, all of the isotopes are radioactive.

What are radioactive elements called?

What are Radioactive elements? Some elements of atomic nuclei are unstable because of the presence of excess nuclear charge inside it so these nuclei undergo radioactive decay to form stable nuclei. These elements are called radioactive elements.

What are radioactive elements examples?

The following radioactive elements are found naturally in the environment.

  • Alpha Radiation. Alpha radiation is a type of energy released when certain radioactive elements decay or break down.
  • Uranium. Uranium is a radioactive element that can be found in soil, air, water, rocks, plants and food.
  • Radium.
  • Radon.
  • Polonium.

What is an isotope simple definition?

An isotope is one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties. Every chemical element has one or more isotopes.

What is radioactive isotopes Wikipedia?

A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess nuclear energy, making it unstable.

Which best describes a radioactive isotope?

Different isotopes of the same element have the same number of protons in their atomic nuclei but differing numbers of neutrons. Radioisotopes are radioactive isotopes of an element. They can also be defined as atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus.

How do you identify a radioactive isotope?

Radioisotope Identification Devices (RIIDs) are instruments that are designed to determine the identity of radioactive materials by measuring the energy of the emitted gamma rays.

What are the examples of radioactive elements?

What are the 4 radioactive elements? The common 4 radioactive elements are Uranium, Radium, Polonium, Thorium etc.

How do radioactive isotopes differ from isotopes?

What are the harmful effects of radioactive isotopes?

Alpha particles – heavy but do not go over 20 cm. So if you don’t have an isotope close to you – you are totally safe.

  • Beta radiation – electrons. Blocked by any objects. Held by cloth and skin a lot. They go through,but lose a lot of energy.
  • Gamma is rare and mostly man-made.
  • What are some examples of radioactive isotopes?


  • Radium.
  • Radon.
  • Bismuth.
  • What are the beneficial uses of radioactive isotopes?

    Radioactive isotopes have many useful applications. In medicine, for example, cobalt-60 is extensively employed as a radiation source to arrest the development of cancer. Other radioactive isotopes are used as tracers for diagnostic purposes as well as in research on metabolic processes.

    What are some applications of radioactive isotopes?

    Define tracer and give an example of how tracers work.

  • Name two isotopes that have been used as tracers.
  • Explain how radioactive dating works.
  • Name two isotopes that have been used in radioactive dating.
  • The current disintegration rate for carbon-14 is 14.0 Bq.
  • A small asteroid crashes to Earth.
  • What is a positive aspect of the irradiation of food?