(Solved): 1- Graphene (A 2D plane of carbon atoms) has a hexagonal 2D lattice structure shown below. Assume t ...

1- Graphene (A 2D plane of carbon atoms) has a hexagonal 2D lattice structure shown below. Assume the lattice parameter is $1.42\dot{A}$. a. Define a unit cell. (Draw it clearly) b. Is this a Bravais lattice? c. How many atoms are there per unit cell? d. What is the coordination number of each atom? $+1$ $+1$ $+1$ e. What is the distance between each atom and its second nearest neighbor? $+1$