Why does one electron in a potassium atom go into the fourth energy level instead of squeezing Into third energy level along with the eight already there?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Which would freeze at a higher temperature: the great salt lake or lake tahoe? a. lake tahoe would freeze at a higher temperature. b. the great salt lake would freeze at a higher temperature. c. both lakes would freeze at the same temperature.

Ahas distinct properties and composition that never vary.