Graphene is a single layer of carbon atoms arranged in a ________ lattice.
- Cubic
- Hexagonal
- Tetragonal
- Orthorhombic
Answer: Hexagonal
Graphene's 2D honeycomb lattice gives exceptional strength, conductivity, and flexibility. Applications: flexible electronics, composites, sensors. Nobel Prize in Physics 2010. [[NCERT Chemistry Class 11, DST Reports]]