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

How Many Neutrons Does 

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Strontium (Sr)  Have?





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

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Descriptio







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



                    Step-1:


●The atomic number of  strontium (Sr)   is the number of protons in strontium (Sr)'s nucleus.


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


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



How Many Neutrons Does rubidium (Rb) Have?




                    Step-2:

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





From periodic table,


  ●Atomic number of  strontium (Sr) is 38.

●Atomic mass of  strontium (Sr) is 87.62

●To find out mass number,we need to round 87.62 to a whole number.So,by rounding,we are getting mass number of  strontium (Sr) .The mass number of  strontium (Sr)  is 88.




                    Step-3:

How Many Neutrons Does strontium (Sr) Have?

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


●Number of neutrons=88-38=50

In another way,

●Mass number=Protons +Neutrons

Or,88 =38+Neutrons

Or,88-38=Neutrons

Therefore,
Neutrons=50





Therefore,the number of neutrons in strontium (Sr) ) is 50 here for this isotope.Remember that neutrons are present in the nucleous of strontium (Sr) and it's charge is zero.

●Number of protons in strontium (Sr)  is 38.Protons are present in the nucleus of strontium (Sr) .



● Number of electrons in strontium (Sr)  is 38.Remember that number of electron equals to proton in a neutral atom.Eletrons are present outside of nucleus of strontium (Sr) )  .


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