If an atom has 17 protons and 18 neutrons, what is the charge of the atom's nucleus?

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

1) this is the structure in the cell nucleus that houses a cell's genetic information

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.