Near-filled rows show the last empty slot boundary. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Two empty slots remain a partial band
The finite band has the same slot budget in every row. Only the electron count changes, so the empty-slot count decides the boundary.
slots=4⋅2=8,electrons=6,empty=2
One empty slot still remains partial
The finite band has the same slot budget in every row. Only the electron count changes, so the empty-slot count decides the boundary.
slots=4⋅2=8,electrons=7,empty=1
No empty slots makes the band filled
The finite band has the same slot budget in every row. Only the electron count changes, so the empty-slot count decides the boundary.