That area will be radioactive for a long, long time.
Francium is a "radioactive" element.
Uranium is naturally radioactive.
Cancer usually requires some form of radioactive treatment, such as one of the most infamous methods, chemotherapy.
The X-Ray machine is radioactive
You can just put something in the sentence that is going to be radioactive that's all.
You have to use a microscope to see the radio active fuel
"The radioactive decay of certain unstable isotopes is used to calculate the age of objects."
"Marie Curie was a pioneer of radioactive research".
Can you use the word concluding in a sentence? Done.
You can use the word Truss in a sentence like this.
Here is an example sentence with the word "catastrophe":The Chernobyl disaster was truly a catastrophe, 350400 people had to evacuate from their homes and thousands suffered from radioactive related diseases.
Just use it! Or do you mean, can you use the word beheld in a sentence.