” ... the heavier electrons in molybdenum ...”
What?
Science writers might know how to construct sentences, but they don’t know Jack about science...
yeah, i tripped on that also
While it is true that "electrons are electrons are electrons", there is sometimes an interaction of an electron with a material that makes it act as a new kind of quasiparticle, like an electron with much greater mass.
The general subject matter is called "heavy fermions".
That is exactly what I was thinking. An electron is an electron.
Now your just being silly. A lot of science writers can't construct sentences either.