Radioactive Elements and Their Applications

Which isotope of uranium is primarily used in nuclear reactors?

• Uranium-240

• Uranium-239

• Uranium-238

• Uranium-235

What makes thorium a potentially better alternative to uranium for nuclear reactors?

• It is less expensive to extract

• It is more stable

• It is more abundant

• It has a higher energy output

What is the primary use of potassium-40 in scientific research?

• Medical imaging

• Nuclear energy

• Industrial applications

• Radiometric dating

How does carbon-14 contribute to archaeology?

• By enhancing soil fertility

• By dating organic materials

• By improving plant growth

• By providing energy

What is the primary health risk associated with radon exposure?

• Bone cancer

• Lung cancer

• Thyroid cancer

• Skin cancer

Why is polonium considered dangerous?

• It is highly stable

• It is highly abundant

• It is highly radioactive

• It is highly reactive

What was radium historically used for before its dangers were known?

• Industrial lubricants

• Medical imaging

• Glow-in-the-dark paints

• Nuclear reactors

What is technetium-99m primarily used for in medicine?

• Bone density measurement

• Thyroid treatment

• Cancer treatment

• Blood flow imaging

What is americium-241 commonly used in?

• Industrial gauges

• Medical imaging

• Nuclear reactors

• Smoke detectors

What is a significant risk associated with cesium-137?

• Low energy output

• High reactivity

• Short half-life

• Non-radioactive nature