【】How Many Neutrons Does Helium Have?||Number of Neutrons in Helium

Answer:

Helium has two neutrons   for this isotope.

Explanation:

Hello,Everyone! today we are going to learn  about how many neutrons helium have in just 3 steps.

To find out the number of neutrons  for helium,we have to have knowledge about atomic number,atomic mass,mass number of helium.

                    Step-1:


●The atomic number of helium is the number of protons in helium's nucleus.



●The atomic mass of helium is the average number of  protons plus neutrons of all the isotopes of helium.


●The Masss number of helium is the number of protons plus neutrons of a specific isotope of helium.

                    Step-2:

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

From periodic table,


  ●Atomic number of helium  is 2(two).

●Atomic mass of  helium is 4

●To find out mass number,we need to round 4.00.So,by rounding,we are getting mass number  of helium.The mass number of helium is 4.




                    Step-3:

By the difference between mass number and atomic number of helium,we get the number of neutrons in helium.


●Number of neutrons=4-2=2
Therefore,the number of neutrons in helium is 2 here for this isotope.

● Number of electrons in helium is 2.Remember number of electron equals to proton.

●Number of protons in helium is 2.

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