Technetium has no stable isotopes.
The inner transition metals are radioactive and are found in the f-block. These are commonly referred to as actinoids and are alkali metals.
You think probable to artificial radioactive elements considered transition metals.
The most radioactive element in the transition metals group is technetium. It has no stable isotopes and is typically produced in nuclear reactors as a byproduct. Its most common radioactive isotope is technetium-99, which is used in various medical procedures such as imaging scans.
Mendelevium is an artificial element, transition metal, solid, radioactive, unstable, actinoid.
Transition metals. in fact, it is the Only radioactive transition metal!
There transition, which is the same thing as magnetic
Being radioactive californium is unstable.
Radioactive elements are unstable, and the shorter the half-life, the more unstable they are.
When an isotope is unstable, it is said to be radioactive.
Iron and other transition metals are used in construction due to their strength, durability, and versatility compared to alkali metals. Alkali metals are too reactive and unstable in air and water, making them unsuitable for most construction applications. Transition metals can form strong alloys and have desirable properties that make them more practical for structural uses.
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.
The most unstable species in the periodic table among transition and inner transition elements is #43 Technetium (Tc). It is so unstable that it does not occur naturally.