What system of measurement do most scientists use

What is the most stable monatomic ion formed from nitrogen

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?

Why do cells appear different in distilled water than they do in 10% salt water?