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Old Jul 14th 2019, 03:14 AM   #1
Aesop
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The correct amu of iron?

Hey, i noticed that in different graphics of the periodic elements Iron has a amu of 55.845, but in others 55.847. Can anyone confirm either one or is it simply a rounding of the number?

Thank you for any help.
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Old Aug 27th 2019, 12:07 AM   #2
chemtopper
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55.845(2) uncertainty in last digit.
For officially accurate value refer this periodic table.
https://iupac.org/wp-content/uploads...le-01Dec18.jpg
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