pith. machine review for the scientific record. sign in
def definition def or abbrev

halogenZ

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formal statement (Lean)

  53def halogenZ : List ℕ := [9, 17, 35, 53, 85]

proof body

Definition body.

  54
  55/-- Decidable instance for halogen membership. -/
  56instance : DecidablePred isHalogen := fun Z =>
  57  if h : distToClosure Z = 1 then isTrue h else isFalse h
  58
  59/-! ## Sign Predictions -/
  60
  61/-- Noble gases have EA proxy = 0 (at closure, no benefit from adding electron). -/

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