DRIVING HAZARDS. The summit access road is approximately 10 miles long and has an altitude change of nearly 5,000 feet (1,510 m). There are many sections with a grade of 15 percent.
In simple terms, graphene, is a thin layer of pure carbon; it is a single, tightly packed layer of carbon atoms that are bonded together in a hexagonal honeycomb lattice. In more complex terms, it is an allotrope of carbon in the structure of a plane of sp2 bonded atoms with a molecule bond length of 0.142 nanometres.
The central atom is surrounded by 6 regions of electron densiy - 4 single bonds and 2 lone pairs. This means that its steric number is equal to 6. Its coordination number, which is given by the number of atoms that are bonded to iodine, is equal to 4.