The mass number = protons + neutrons. Bromine has a mass number of 80<span> and 35 protons so </span>80<span>-35 = </span>45<span> neutrons. b) How many electrons does the neutral atom of bromine have? The neutral atom of bromine has 35 electrons because the number of electrons equals the number of protons.</span>
Y=15 x=60
•1/3 •1/3
y=5 x=45
Because they are different elements have different number of protons and neutrons........ I guessed do not trust me...
The magnetic field of an electromagnet disappears as soon as current is turned off.