In the electron configuration for scandium (atomic number 21), what is the notation for the three highest-energy electrons?
Select one:
O a. 30% 452
O b. 453
O c. 3d3
O d. 452 4p?

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.