1. Promethium is a rare earth metal that is often used in nuclear batteries.
2. The scientist discovered a new method for extracting promethium from its ore.
3. The spacecraft used a promethium power source to generate electricity.
4. Promethium has a variety of industrial applications, including in the production of luminous paints.
5. The team of researchers studied the properties of promethium isotopes in their experiment.
6. Due to its high radioactivity, promethium must be handled with extreme caution.
7. The company invested in promethium mining operations in order to meet the growing demand for the metal.
8. Promethium is a key component in the development of advanced nuclear technologies.
9. The government imposed strict regulations on the storage and disposal of promethium waste.
10. Scientists are working to find new ways to recycle promethium in order to reduce its environmental impact.