An isotope of phosphorus has a half-life of 14 days. if you started with a 500 gram sample, how
much would remain after 28 days?

Will mark brainliest how many electrons can be held in the energy level n = 4?

Which statement would indicate the presence of an acid

What happens to the glucose molecule during the process of cellular respiration? (5 points) select one: a. it gets broken down. b. it forms oxygen. c. it builds muscles. d. it uses up energy.