What elements is radioactive and synthetic barrium cesium currium and xenon?

Answer 1

Curium {Note correct spelling} is only element in the list given that is radioactive and synthetic.

^ not correct answer and not even spelled right the correct answer is "lawrencium"

The rare earth elements are located at the bottom of the Periodic Table and are comprised of the lanthanoid series and the actinoid series.

The actinoid series is the second row of rare earth elements. All of these elements are radioactive, and all of these elements (except actinium, thorium, protactinium, and uranium) are synthetic.

Answer 2

Curium, Barium, and Cesium are radioactive elements. Xenon is a noble gas and not radioactive. All these elements can be artificially produced (synthetic) through nuclear reactions.