The noble gases include helium, neon, argon, xenon. What do their electron configurations have in common? Answer choices:
a- In the highest occupied energy level, the s sublevel is filled and the p sublevel is empty.
b- In the highest occupied energy level, the p sublevel is half-filled.
c- In the highest occupied energy level, the s and p sublevels are completely filled.
d- In the highest occupied energy level, the s sublevel has one electron.

For part 1, describe the changes in the colors of the well, if any, as you go from well 1 to well 9—that is, as you go from the well with the least copper(ii) nitrate to the well with the most copper(ii) nitrate. which wells had the most distinct precipitate? for part 2, describe the changes in the colors of the well, if any, as you go from well 1 to well 9—that is, as you go from the well with the least iron(ii) sulfate to the well with the most iron(ii) sulfate. which wells had the most distinct precipitate? for part 3, describe the changes in the colors of the well, if any, as you go from well 1 to well 9—that is, as you go from the well with the least iron(iii) nitrate to the well with the most iron(iii) nitrate. which wells had the most distinct precipitate?