Examlex
Which of the following would NOT produce what the UPC defines as gray water?
Isotope
Variants of a particular chemical element that have the same number of protons but different numbers of neutrons in their nuclei.
Electrons
Negatively charged subatomic particles found in electron clouds around an atom's nucleus, playing a key role in chemical bonds.
Germanium
A chemical element with the symbol Ge and atomic number 32, a metalloid used in semiconductors and fiber optics.
Neutrons
Neutral particles found within an atom's nucleus, not possessing any electric charge and contributing to the atom's mass.
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