Which of the following is an example of violating aufbau principle in filling electronic orbitals

What type of reaction is zn + cucl2 → cu + zncl2?

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

Will mark brainliest how many electrons can be held in the energy level n = 4?