【】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-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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