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abstraction > mathematical concept > number > constant > fundamental physical constant > atomic constant > Hartree energy

Hartree energy comparison table

Subject	has equation	is an instance of	has unit	has uncertainty	is a kind of	has symbol	has value
atomic constant					fundamental physical constant		changes in value are due solely to an increase in measurement accuracy or convention
energy			energy unit		quantity
Hartree energy		energy	energy unit	0.00000034 × 10-18 J		Eh	4.35974381 × 10-18 J

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