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It isn't really an ELEMENT that is unstable, but an ISOTOPE. That means that in general, for the same element, some atoms will decay, and some will not - the difference being the number of neutrons in the nucleus.

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6y ago
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12y ago

An atom with an unstable nucleus is described as radioactive.

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11y ago

An Atom with an unstable nucleus is described as radioactive

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9y ago

An unstable atomic nucleus is called a radioisotope.

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6y ago

a radioisotope.

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11y ago

A Radioisotope

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11y ago

It is described as radioactive

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11y ago

radio-isotopes

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6y ago

These are the radioactive elements.

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12y ago

radioactive

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Q: What is An unstable isotope is called what?
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Related questions

What is an unstable atom that emits energy called?

This is a radioactive isotope.


What is an unstable isotope?

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


What is the processes where an unstable parent isotope becomes a stable daughter isotope called?

Succesive radioactive disintegrations in a radioactive series.


What is the stable isotope called?

Each isotope, stable or unstable, has a specific symbol; for example K-40 for potassium 40.


When an isotope is blank it is radioactive?

When an isotope is unstable, it is said to be radioactive.


An unstable isotope with extra energy in the nucleus?

A radio-isotope.


Is it true that a stable radioactive isotope called the parent will decay and form daughter products?

1. All the radioactive isotopes are unstable ! 2. Yes, it is true, the parent isotope (radioactive and unstable) decay and form daughter products.


When a unstable isotope decays the daughter isotope that result is always a stable isotope true or false?

false


When does an unstable isotope break down into a stable isotope?

The process is called decay, or sometimes nuclear decay. A link can be found below.


What is the difference between a stable isotope and a unstable isotope?

A stable isotope does not decay and therefore, maintains a constant concentration on Earth. An unstable isotope, also known as a radioactive isotope, decays at a predictable and measurable rate on Earth. An unstable isotope may decay by the ejection of an electron or positron, known as beta decay, or by the ejection of two protons and two neutrons, known as alpha decay.


What is another term for an atom that is unstable?

isotope


What do isotope and half life have in common?

Each (unstable) isotope has a distinctive half-life.