1. If 50.69% of Potassium (K) is K-45 and 49.31% is K-39, what is the average atomic mass of Potassium?

Select the word from the list that best fits the definition of branch of islam that is in iran

What border separates sonora and chihuahua national border state border physical boundary natural boundary

Scientists believe that differences in cause hot, plastic-like rock in the asthenosphere to rise toward earth's surface. a. density c. weight b. magnetism d. composition c. conduction. d. density.