Unstable isotopes can be chemically reactive.
Isotopes differ each other from the number of neutrons which is a chemically inert subatomic particle.
The term is "inert." Inert substances do not react chemically with other substances.
Unstable isotopes are radioactive isotopes, can disintegrate and emit radiations.
Helium is considered an inert noble gas. Only some unstable compunds of helium are known today: HeNe, HgHe10, WHe2.
Hydrogen has 1 unstable isotope, and 2 stable isotopes.
Covalent Bond. Chemically Active. The only elements that are inert are group 18, or 8A.
Not all isotopes are unstable. But now more than 3 000 unstable isotopes are known, artificial or natural.
No radioactive isotopes of neon are ordinarily found in nature. All elements have radioactive synthetic isotopes, however.
inert as in the inert gases or "noble" gases
Polonium is the element in group 16 that has unstable isotopes. It is a radioactive element with no stable isotopes.
Some isotopes are stable, others are unstable.
All the isotopes of americium are radioactive and unstable.