[SeeSac]

You failed to show me where in the article. You will not go google chlorine atomic mass. You ignore my reference. Good night. I hope you don't blow up the chemistry lab class tomorrow.

[BenKenobi]

I didn’t ignore your reference. The reference quotes what I said. Atomic masses are expressed as a ratio of C-12.

Relative atomic masses express the ratio of the isotopes as found here on earth. They are not the same thing. They do not mean the same thing. One references an intrinsic property of the element, and one references experimental data which is sometimes right.

We’ve come to agreement on pretty much everything. You like the change, although I’m not sure why. I don’t. I like my periodic table as is.