Answer:
U (uranium):
there are 92 protons, 92 electrons, and 146 neutrons.
Cu (copper):
there are 29 protons, 29 electrons, and 23 neutrons
Explanation:
(electrons on periodic table, the number of protons is the same as that of electrons, and to find the amount of neutrons you would have to subtract the atomic number from the atomic mass)
