shy1607 shy1607 08-12-2021 Chemistry contestada How many protons, neutrons, and electrons are in an atom of beryllium with a mass number of 9? A) 5 protons,5 electrons,4 neutrons B) 4 protons,4 electrons,4 neutrons C) 4 protons,4 electrons,9 neutrons D) 4 protons,4 electrons,5 neutrons
