Chemistry — Oxidation Number Rules
The rules for assigning oxidation numbers.
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digraph OxRules {
node [shape=box, style=rounded];
"Oxidation numbers" -> "Free element = 0";
"Oxidation numbers" -> "Group 1 = +1, Group 2 = +2";
"Oxidation numbers" -> "O = -2 (usually)";
"Oxidation numbers" -> "H = +1 (with non-metals)";
"Oxidation numbers" -> "Sum = overall charge";
}