radium

2. : related to the treatment of illness and injuries
3. (also known as nuclear decay, radioactivity, radioactive disintegration or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation.
8. curie French physicist, a pioneer in crystallography
10. a radioactive isotope
11. : the scientific study of the medical use of radiation, especially X-rays
12. : the process of something becoming weaker or being destroyed by breaking into smaller parts or pieces
14. : the atomic number of radium

1. : a substance that cannot be broken down into any simpler chemical substances and is made of atoms all of the same type
3. a form of energy that comes from a nuclear reaction and that can be very dangerous to health
4. a Polish and naturalized-French physicist and chemist
5. : the quality that some atoms have of producing a type of energy that can be very harmful to health
6. a form of an atom that has a different atomic weight from other forms of the same atom
7. a penetrating form of high-energy electromagnetic radiation
9. : a radioactive chemical element that is found in uranium ore
13. chemical element with the symbol Ra