deetee wrote: ↑Tue Nov 26, 2019 5:41 am
Please tell me if you have any suggestions or find some errors (I had some typos in the old version). So far all periodic tables I found are different from each other. Maybe because of rounding errors or outdated/updated numbers.
I believe the atomic masses shown in most periodic tables are weighted averages of the masses of all the known isotopes for each element... and that is a bit of a moving target: while it is possible to measure the atomic masses of individual isotopes to extremely high precision, the relative abundances of the various isotopes are generally not known to such accuracy.
Regarding the issue of whether the first day of the week should be Sunday or Monday -- I always thought that Monday made more sense, at least from a Biblical perspective, because didn't God rest on the
last day? But apparently it's not that simple, because the Bible doesn't mention those heathen weekday names, and apparently this is a question that people have been arguing over well into modern times, as I learned when I noticed a historical marker by the side of the road on my daily commute. This sign explains the name Quibbletown, as follows:
The New Market section historically comprised the Quaker village of Quibbletown. The early name of the village originated from the fact that settlers of different religious denominations quibbled about whether the Sabbath should be observed on Saturday or on Sunday in the village.
(See
https://en.wikipedia.org/wiki/Piscataway,_New_Jersey)
There's nothing wrong with ISO defining Monday to be the first day of the International Standard Week, but to claim that that is in any way the "correct" day is as silly as saying that the meter is the "correct" unit of length.
