A: Good question. And one you should ask of your hotel, too. Resort fees, which can add a full 30 percent onto a hotel bill, may cover everything from wireless Internet and gym access to faxing and use of a notary (huh?)âservices and amenities that you may have no interest in using.
1 Potassium is made, along with several other elements including sulfur, and silicon, during explosive oxygen burning in supernovae. 2  All plants need potassium to survive; over 90% of all human use of potassium compounds is in the manufacture of plant fertilizers.
95 - 98+. Although Potassium only has two stable isotopes (K-39 and K-41), the long-lived radioisotope K-40 is often also regarded as a stable isotope. Potassium Isotopes, mainly K-40 and K-41, are used to study the impact of potassium on the growth of plants and of the human cardiovascular system.