【 】How Many Neutrons Does Selenium (Se) Have?||Number of Neutrons in Selenium
How Many Neutrons Does Selenium (Se) Have?
Answer:Selenium has 45 neutrons for this isotope.
Explanation:
Hello, chemistry lover! today we are going to help you to find out how many neutrons selenium (Se) have in just 3 steps.
To find out the number of neutrons for selenium (Se) ,we have to have knowledge about atomic number,atomic mass,mass number of selenium (Se)
.Click picture to see clearly.
Step-1:
●The atomic number of selenium (Se) is the number of protons in selenium (Se) 's nucleus.
●The atomic mass of selenium (Se) is the average number of protons plus neutrons of all the isotopes of selenium (Se) .
●The masss number of selenium (Se) is the number of protons plus neutrons of a specific isotope of selenium (Se) .
Step-2:
We need to convert atomic mass of selenium (Se) to mass number of selenium (Se) by rounding if necessary (In case of fraction) .
From periodic table,
●Atomic number of selenium (Se) is 34.
●Atomic mass of selenium (Se) is 78.96
●To find out mass number,we need to round 78.96 to a whole number.So,by rounding,we are getting mass number of selenium (Se) .The mass number of selenium (Se) is 79.
Step-3:
By the difference between mass number and atomic number of selenium (Se) ,we get the number of neutrons in selenium (Se) .
●Number of neutrons=79-34=45
In another way,
●Mass number=Protons +Neutrons
Or,79 =34 +Neutrons
Or,79-34=Neutrons
Therefore,
Neutrons=45
Therefore,the number of neutrons in selenium (Se) is 45 here for this isotope.Remember that neutrons are present in the nucleous of selenium (Se) and it's charge is zero.
●Number of protons in selenium (Se) is 34.Protons are present in the nucleus of selenium (Se) .
● Number of electrons in selenium (Se) is 34.Remember that number of electron equals to proton in a neutral atom.Eletrons are present outside of nucleus of selenium (Se) .
Continue
Hello, chemistry lover! today we are going to help you to find out how many neutrons selenium (Se) have in just 3 steps.
.Click picture to see clearly.
Step-1:
●The atomic number of selenium (Se) is the number of protons in selenium (Se) 's nucleus.
●The atomic mass of selenium (Se) is the average number of protons plus neutrons of all the isotopes of selenium (Se) .
●The masss number of selenium (Se) is the number of protons plus neutrons of a specific isotope of selenium (Se) .
Step-2:
We need to convert atomic mass of selenium (Se) to mass number of selenium (Se) by rounding if necessary (In case of fraction) .
From periodic table,
●Atomic number of selenium (Se) is 34.
●Atomic mass of selenium (Se) is 78.96
●To find out mass number,we need to round 78.96 to a whole number.So,by rounding,we are getting mass number of selenium (Se) .The mass number of selenium (Se) is 79.
Step-3:
By the difference between mass number and atomic number of selenium (Se) ,we get the number of neutrons in selenium (Se) .
●Number of neutrons=79-34=45
In another way,
●Mass number=Protons +Neutrons
Or,79 =34 +Neutrons
Or,79-34=Neutrons
Therefore,
Neutrons=45
Therefore,the number of neutrons in selenium (Se) is 45 here for this isotope.Remember that neutrons are present in the nucleous of selenium (Se) and it's charge is zero.
●Number of protons in selenium (Se) is 34.Protons are present in the nucleus of selenium (Se) .
● Number of electrons in selenium (Se) is 34.Remember that number of electron equals to proton in a neutral atom.Eletrons are present outside of nucleus of selenium (Se) .
Continue
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