avicenna

Say if I have a laser beam. If I shine another laser beam to intersect the first beam, will this first beam be affected?

This is only about a redefinition of some SI units such as the kilogram. With whatever changes in the SI units, the atomic mass will still be measured through mass spectrometry. When mass spectrometry was invented after the 1910, they only go for greater improvements to get higher resolution. There is no published experiment that anyone made any independent verification if mass spectrometry is reliable. Our current analytical balance is accurate to 10¯⁵, enough to make chemical analysis of relative atomic mass of compounds composed of single isotopes of the elements. A simple example is sodium iodide; both elements exist as stable single isotope in nature.

Has there been any experiment done through chemical analysis to check if mass spectrometry is consistent with our chemical balance? Our current analytical balance has an accuracy of 10¯⁵. The chemical composition by weight of two isotopes forming a compound could be analyzed. This is sufficient to determine a relative atomic mass of two isotopes and to compare with the CODATA values obtained through mass spectrometry. The values should be the same to at least the third decimal. This is a very good test of the reliability of mass spectrometry. We have about 19 monoisotopic elements including Fluorine and Iodine; these two may react with the other monoisotopic elements to form compounds.

What you get is only the classical atomic weights. In nature H has 0.02% deuterium. O has O16, O17 and O18 in various %. So the old atomic weights is a mixture of isotopes. We need H₂O that is made from pure isotope ¹H and pure isotope ¹⁶O. Only then can we get real relative atomic mass to compare with the CODATA obtained from mass spectrometry..

I know isotopes exists. What I am really interested is getting the actual relative atomic mass using our chemical balances and not through mass spectrometry. Then compare it with the CODATA. Has anyone ever checked if their scales don't give short weights and measures! Even in ancient times, officials would come to check the scales you use to measure grains. What if mass spectrometry is off! Avicenna would even ask if God exists.

I know we can get the relative atomic mass of any two nuclides by just looking up the CODATA. But I'll like to know if anyone has measured atomic mass with a chemical process. Say we analyze the weight composition of ¹H₂¹⁶O to get the relative mass of ¹⁶O/¹H. Or of any other two elements through any chemical process.