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The half life of a radioisotope indicates the rate of decay for a radioactive sample

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The amount of time it takes for half of the radioisotopes in a sample to decay into their stable end products is called?

The half-life


From the above table of radioisotopes and their properties it is obvious that?

there are a wide range of radioisotopes with varying properties such as half-life, type of decay, and energy emitted. Some radioisotopes are more stable and have longer half-lives, while others decay quickly and emit different types of radiation. The properties of radioisotopes are important when considering their applications in medicine, industry, and research.


What is the half-life of Tb?

The Terbium isotope found in nature (159Tb) is stable. Like all elements, Terbium has radioisotopes, of which 33 have been created to date. 158Tb is the most stable of these, with a half-life of 180 years, 157Tb has a 71 year half-life. 160Tb has a half-life of 72.3 days. Most of the remaining radioisotopes have half-lives that are less measured in seconds, although some have half lives that are measured in days.


How do radioisotopes of an element differ feom other isotopes?

Radioisotopes are "radioactive isotopes"; they are not stable. Radioactive atoms will decay, or break apart into other atoms, by emitting an electron, or a neutron or a positron or an alpha particle (2 protons and two neutrons). The rate at which this happens is measured by the "half-life"; after one half-life, half of the atoms will have decayed. After another half-life, half of the remaining atoms will have decayed. Atoms with short half-lives are highly radioactive, and can be fairly dangerous. Atoms with long half-lives are only slightly radioactive, and aren't all that dangerous.


Why Radioisotopes in nuclear medicine are desirable to have shorter half lives?

A short half-life means the material only remains radioactive for a short time and does not continue to release radiation into the patient or environment.


What does the half-life a radioisotope indicate?

The rate of decay for a radioactive sample


What does a half life of a radioisotope indicate?

The rate of decay for a radioactive sample


What does the half life of a radioactive substance indicate?

It indicates how long it takes for the material to decay.


What does a half life of a radioactive substance indicate?

It indicates how long it takes for the material to decay.


Which of these naturally occurring radioisotopes would be most useful in dating objects thought to be millions of years old?

Potassium-40 half life = 1.28 x 10^9


Radioisotopes used for medical diagnosis must have?

short half-lives and be quickly eliminated from the body


Are radioisotopes salts?

Radioisotopes are not salts but salts may contain radioisotopes.