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.
An atom with an unstable nucleus is described as radioactive.
An Atom with an unstable nucleus is described as radioactive
An unstable atomic nucleus is called a radioisotope.
a radioisotope.
A Radioisotope
It is described as radioactive
radio-isotopes
These are the radioactive elements.
radioactive
Unstable isotopes are radioactive isotopes, can disintegrate and emit radiations.
Succesive radioactive disintegrations in a radioactive series.
Each isotope, stable or unstable, has a specific symbol; for example K-40 for potassium 40.
A radio-isotope.
When an isotope is unstable, it is said to be radioactive.
This is a radioactive isotope.
Unstable isotopes are radioactive isotopes, can disintegrate and emit radiations.
Succesive radioactive disintegrations in a radioactive series.
Each isotope, stable or unstable, has a specific symbol; for example K-40 for potassium 40.
When an isotope is unstable, it is said to be radioactive.
A radio-isotope.
1. All the radioactive isotopes are unstable ! 2. Yes, it is true, the parent isotope (radioactive and unstable) decay and form daughter products.
false
The process is called decay, or sometimes nuclear decay. A link can be found below.
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.
isotope
Each (unstable) isotope has a distinctive half-life.