Which f-block element is known for its use in nuclear reactors?

Which f-block element is known for its use in nuclear reactors?

Step 1: Understand what f-block elements are. They are a group of elements in the periodic table that include the lanthanides and actinides.
Step 2: Identify the f-block elements that are commonly known. These include elements like uranium, thorium, and plutonium.
Step 3: Learn about the uses of these elements. Some are used in nuclear reactors for their ability to undergo fission.
Step 4: Focus on thorium (Th). It is an f-block element that is specifically known for its use in nuclear reactors.
Step 5: Understand why thorium is used. It can breed fissile uranium-233, which is useful for sustaining nuclear reactions.

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