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>
The first one because they can move forward
No, darker colors like purple and blue have higher wave frequency which transmit more energy.
The speed should be 48 mph, because 7200 divided by 150 is 48
