luvlustfortoes: abbydothchortle: “In 1969, the Commission recommended the standard atomic weight of Pd to be Ar(Pd) = 106.4(1) which gave palladium the least precisely tabulated atomic weight at that time. A decade later, using new mass-spectrometric
tags: Maybe,
from: https://michagberlin2002.tumblr.com/post/169874947376