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Half lives can be any length, from a few milliseconds to millions of years.

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13y ago
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10y ago

It is the time in which a number of unstable isotope nuclei reduces to half its original number.

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12y ago

true true true :)

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12y ago

False

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Q: The half-lives of unstable isotopes vary from milliseconds to billions of years?
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Related questions

What is the lifetime of an electron?

The life of an isotope depends on whether it is stable or not. Stable isotopes do not decay and therefore, do not have an lifetime since they do not go away. Unstable isotopes decay at predictable rates. However, each unstable isotope decays at a its own rate. Therefore, the life of an unstable isotope depends on the isotope in question. Some isotopes have extremely short lifetimes (milliseconds) and other have extremely long lifetimes (billions of years).


Are unstable isotopes chemically inert?

Unstable isotopes can be chemically reactive.


What is an unstable isotope?

Unstable isotopes are radioactive isotopes, can disintegrate and emit radiations.


Hydrogen has how many unstable isotopes?

Hydrogen has 1 unstable isotope, and 2 stable isotopes.


How are isotopes different from stable atoms?

Unstable isotopes can spontaneously undergo changes, transforming them into other isotopes of the same or of different elements. Stable isotopes do not. Some isotopes are very unstable and exist for less than a second; others can exist for billions of years but still be unstable. Many elements consist of more than one isotope. One or more of these isotopes may be unstable. In isotopes of an element, the nucleus contains different numbers of neutrons while the number of protons remains the same and determines how the atom behaves chemically. There are several types of instability (too few neutrons, too many neutrons) and several types of decay.


Are All isotope unstable?

Not all isotopes are unstable. But now more than 3 000 unstable isotopes are known, artificial or natural.


Does americium has stable isotopes?

All the isotopes of americium are radioactive and unstable.


Why are some isotopes called radioactive?

These isotopes are unstable and emit radiation.


What are isotopes considered radioactive?

Not all isotopes are radioactive; the radioactive isotopes are unstable and emit radiations.


Does the element Mercury contain isotopes?

Mercury has isotopes ranging from an atomic mass of 171 to 210. Of these, only 7 are stable and a further 5 have halflives longer than a halfday. The radioactive isotopes are: 171 to 195, 197, 205 to 210. Two of the stable isotopes also have unstable excited forms.


What is stable and unstable isotopes?

Some isotopes are stable, others are unstable.


What element characteristic does radioactive isotopes have?

These isotopes are unstable and disintegrate emitting radiations.