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The number of neutrons in an atom is easily calculated by taking the mass number and subtracting the atomic number.

Take for example, Uranium: the mass number on the Periodic Table is 238, while the atomic number is 92. Take the difference of 238 and 92 and that will be equal to the number of neutrons.

238-92=146

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Wiki User

12y ago
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Wiki User

15y ago

Take the Atomic Mass, round it. Than subtract the atomic number and you have the neutrons (:

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Wiki User

12y ago

subtract the atomic number from the atomic weight

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Wiki User

12y ago

Take the atomic mass and round it to the nearest whole number. Then subtract this number and the atomic number of that element.

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Wiki User

12y ago

that is science not Cheerleading so get off of here

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Wiki User

12y ago

Subtract the atomic number from the isotope mass number.

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Wiki User

6y ago

The number of neutrons is the difference between mass number and the number of protons.

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josephb2544

Lvl 2
2y ago

Subtract the atomic number from the atomic mass.

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josephb2544

Lvl 1
2y ago
thanks

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Wiki User

7y ago

mass number minus the atomic number

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Q: How do you calculate how many neutrons there are in an atom?
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