【3 Steps】How Many Neutrons Does Praseodymium(Pr) Have?||Number of Neutrons in Praseodymium(Pr)

How Many Neutrons Does 

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Praseodymium(Pr) Have?




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Hello, chemistry lover! today I am going to help you to find out how many neutrons  praseodymium(Pr) have in just 3 steps.




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To find out the number of neutrons for praseodymium(Pr),we have to have knowledge about atomic number,atomic mass and mass number of praseodymium(Pr).


.Click picture to see clearly.



                    Step-1:


●The atomic number of  praseodymium(Pr)  is the number of protons in praseodymium(Pr)'s nucleus.


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


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



How Many Neutrons Does praseodymium(Pr) Have?




                    Step-2:

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





From periodic table,


  ●Atomic number of  praseodymium(Pr) is 59.

●Atomic mass of  praseodymium(Pr) is 140.9

●To find out mass number,we need to round 140.9 to a whole number.

So,by rounding,we are getting the mass number of praseodymium(Pr).The mass number of praseodymium(Pr) (we are getting) is 141.




                    Step-3:

How Many Neutrons Does praseodymium(Pr) Have?


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


●Number of neutrons=141-59=82

In another way,

●Mass number=Protons +Neutrons

Or,141 =59+Neutrons



Or,141-59=Neutrons



Therefore,
Neutrons=82




Therefore,the number of neutrons in praseodymium(Pr) is 82 here for this isotope.Remember that neutrons are present in the nucleous of praseodymium(Pr) and it's charge is zero.



●Number of protons in praseodymium(Pr) is 59.Protons are present in the nucleus of praseodymium(Pr) .











● Number of electrons in praseodymium(Pr) is 59.Remember that number of electron equals to proton in a neutral atom.Eletrons are present outside of nucleus of praseodymium(Pr) .


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