Which Two process is it Giving brainliest 100 points

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?

What are the first three quantum numbers for the electrons located in subshell 2s?

Based on its chemical properties, identify the position of each chemical family on the periodic table.