Answer:
In a neutral atom the number of protons = the number of electrons. 35 protons = 35 electrons. But Bromine anion with a charge of -1 has one extra electron so 35 +1 = 36 electrons. 36 electrons is the number of electrons in the stable inert gas Krypton. ... Protons + neutrons = Mass putting in known values.
Explanation:
High concentration and passive transport
Atomic mass is determined by the number of protons plus the number of neutrons
