What is a substance that gives off high-energy particles or rays?

A. Scanner
B. Half-life
C. Barium
D. Radioisotope



Answer :

Final answer:

A radioisotope is a substance that emits high-energy particles or rays through radioactive decay.


Explanation:

Radioisotope is a substance that gives off high-energy particles or rays. Radioisotopes are unstable atoms that emit ionizing radiation as they undergo radioactive decay. An example of a radioisotope is carbon-14 used in carbon dating.


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