【 】How Many Neutrons Does Bromine (Br) Have?||Number of Neutrons in Bromine

How Many Neutrons Does Bromine (Br) Have?


Answer:

Bromine has 45 neutrons for this isotope.

Explanation:

Hello, chemistry lover! today we are going to help you to find out  how many neutrons bromine (Br) have in just 3 steps.





To find out the number of neutrons  for  bromine (Br) ,we have to have knowledge about atomic number,atomic mass,mass number of  bromine (Br) 
.Click picture to see clearly.



                    Step-1:



●The atomic number of 
 bromine (Br)    is the number of protons in  bromine (Br) 's nucleus.



●The atomic mass of 
 bromine (Br)    is the average number of  protons plus neutrons of all the isotopes of  bromine (Br)   .


●The masss number of 
 bromine (Br) is the number of protons plus neutrons of a specific isotope of  bromine (Br)  .



How Many Neutrons Does  bromine (Br) )   Have?




                    Step-2:

We need to convert atomic mass of 
 bromine (Br)   to mass number of   bromine (Br)   by rounding if necessary (In case of fraction) .





From periodic table,


  ●Atomic number of 
 bromine (Br)   is 35.

●Atomic mass of  
bromine (Br)   is 79.90

●To find out mass number,we need to round 
79.90 to a whole number.So,by rounding,we are getting mass number of  bromine (Br) .The mass number of  bromine (Br)  is 80
.




                    Step-3:

How Many Neutrons Does bromine (Br) Have?

By the difference between mass number and atomic number of 
bromine (Br) ,we get the number of neutrons in bromine (Br) .


●Number of neutrons=80-35=45

In another way,

●Mass number=Protons +Neutrons

Or,80 =35 +Neutrons

Or,80-35=Neutrons

Therefore,
Neutrons=45




Therefore,the number of neutrons in 
bromine (Br) is 45 here for this isotope.Remember that neutrons are present in the nucleous of bromine (Br) and it's charge is zero.

●Number of protons in 
bromine (Br) is 35.Protons are present in the nucleus of bromine (Br).



● Number of electrons in 
bromine (Br) is 35.Remember that number of electron equals to proton in a neutral atom.Eletrons are present outside of nucleus of bromine (Br)   .


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