What structural property makes graphene an extraordinary material in modern nanotechnology and materials science?
Answer and explanation
Correct answer: C. single-atom carbon sheet with immense strength
- Step 1: Graphene consists of a single layer of carbon atoms arranged in a two-dimensional hexagonal honeycomb lattice. Despite being one atom thick, it is over 100 times stronger than steel, highly flexible, and an exceptional conductor of heat and electricity. Answer: single-atom carbon sheet with immense strength. Why not the others: "dense multi-layered synthetic crystalline lead radiation shields" describes toxic, dense metals used in radiation shielding rather than pure carbon allotropes; "porous organic polymer absorbing all water" describes superabsorbent hydrogels rather than two-dimensional atomic carbon crystals; "unstable radioactive isotope decaying swiftly" confuses stable carbon allotropes with unstable radioactive elements like uranium or radon.
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