## The H_{100} cluster

In this section you will calculate the wavefunction
and the energy level diagrams for the
linear and cyclic H_{100} clusters.

**Exercise 1**: Start DLVisualize,
run a CRYSTAL calculation for the linear case:
H100_linear.inp

**Exercise 2**: Run a CRYSTAL properties calculation
of the energy level diagram + the density of states

for the H_{100} linear cluster,
as explained in **Exercise 4**
for H_{4}.

**Exercise 3**: Start DLVisualize,
run a CRYSTAL calculation for the cyclic case:
H100_cyclic.inp

**Exercise 4**: Run a CRYSTAL properties calculation
of the energy level diagram + the density of states

for the H_{100} cyclic cluster,
as explained in **Exercise 4**
for H_{4}.

**Questions:**
- How many energy levels are there?
- How will the energy level diagram change for an infinite
number of atoms?
- How will the density of state change for an infitite number of atoms?

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