Q:Answer the following question given this paragraph: actinide: The actinides are the 14 elements from thorium (atomic number 90) to lawrencium (atomic number 103). The sublevel is in the process of being filled. The actinides are all radioactive elements and only the first four have been found naturally on Earth. Q: The actinides are all what type of elements? Choices: - large - nuclear - multiple - radioactive A:
A:
radioactive