Donor and acceptor rows show majority type as count arithmetic. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Donors push the electron ledger higher
The toy intrinsic counts are 2 electrons and 2 holes. Donors 6 and acceptors 0 give electron count 8, hole count 2, and margin 6.
e=2+6=8,h=2+0=2,Δ=6
Acceptors push the hole ledger higher
The toy intrinsic counts are 2 electrons and 2 holes. Donors 0 and acceptors 5 give electron count 2, hole count 7, and margin 5.
e=2+0=2,h=2+5=7,Δ=5
Equal donor and acceptor counts are the boundary
The toy intrinsic counts are 2 electrons and 2 holes. Donors 4 and acceptors 4 give electron count 6, hole count 6, and margin 0.