What is the maximum amount of electrons that can be in the third energy level of an atom? (question continued in comments)

What is a property of a double replacement reaction

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

In which situation can a mixture always be called a solution