Chemistry — Electrochemical Cell
Anode, cathode and ion/electron flow in a galvanic cell.
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digraph Cell {
rankdir=LR;
node [shape=box, style=rounded];
"Anode (oxidation)" -> "External circuit" [label="electrons"];
"External circuit" -> "Cathode (reduction)";
"Salt bridge" -> "Anode (oxidation)" [label="ions"];
"Salt bridge" -> "Cathode (reduction)" [label="ions"];
}