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All or almost all elements have radioactive isotopes if artificial isotopes are included. Among the naturally occurring elements, uranium, polonium, radium, and thorium have naturally occurring radioactive isotopes on earth.

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Is promethium representative or transition element?

Promethium is a transition element. It is the only element in the lanthanide series that is radioactive and does not occur naturally on Earth. Its atomic number is 61, and it is commonly used in nuclear batteries and research applications.


What element is memeber of this group all isotopes of this element are radioactive?

There is no group specified so it is not possible to be sure about this answer but all isotopes of promethium are radioactive.


Plutonium is a type of lanthanide or actinide or regular transition element?

Plutonium is an actinide


Where in the periodic table we can fond transition metal element?

The bottom two rows of Lanthanide & Actinide is the transition metals


What are the two series of inner transition elements and what is the trait of each?

The lanthanide and actinide series. Trait of lanthanide: Lanthanum, element 57. Trait of actinide: actinium, element 89.


Most radioactive element in 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.


What element characteristic does radioactive isotopes have?

These isotopes are unstable and disintegrate emitting radiations.


Which element in group 16 has unstable isotopes?

Polonium is the element in group 16 that has unstable isotopes. It is a radioactive element with no stable isotopes.


Is Pm a radioactive substance?

Pm is Prometheum. All isotopes of this element are radioactive.


What element has all of their isotopes radioactive?

An example is uranium.


How do an isotopes and a radioactive isotopes ifferent?

Simply by being radioactive or not. An isotope is an atomic variant of the same element, and has the same chemical characteristics, but is not necessarily radioactive.


Does uranium exist in a stable non-radioactive form?

All the isotopes of uranium are radioactive and unstable.