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The number of neutrons equals the Atomic Mass (MA) minus the atomic number (XA). (#neutrons=MA-XA). The neutrons can be calculated in this manner because neutrons hold significant mass in the atom. The molar mass featured for a particular element in periodic tables is actually the average of the atomic masses of the elements' numerous isotopes (elements with extra neutrons than normal). So, by subtracting this mass by the atomic number (the number of protons), you will get a value that is very close to actual number of neutrons for that average element.

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14y ago

Mass number - number of protons** = number of neutrons

**Note that the number of protons is the same as the number of electrons as well as the atomic number.

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13y ago

Neutrons of an atom can be found by subtracting the atomic number from the mass number.

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Mass number = Number of protons + Number of neutrons

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Take the atomic mass and subtract the number of protons.

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atomic mass-atomic number

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Mass Number minus Atomic Number

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Q: What is the formula for finding the amount of neutrons in an element?
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Related questions

How are all isotopes of a single element different?

Isotopes have the same amount of protons but a different amount of neutrons.


Is it true that atoms of the same element have the same amount of neutrons?

If the chemical element has isotopes the number of neutrons is different for each isotope.


Where are protons and neutrons of an atom contained?

The nucleus of an atom contains protons and neutrons. Different amount of neutrons- Isotopes. Different amount of protons- Different element.


What makes any element that specific element?

The Atom consists of a certain amount of electrons, protons and usually neutrons. The amount of each of these sub-atomic particles is what makes an element that specific element. Actually, it is only the protons. The number of neutrons and/or electrons can vary, and it is still the same element. The one thing that makes an element that specific element is only the number of protons.


What is the name number tells you the amount of protons and neutrons in an element?

Number of protons + Number of neutrons = Mass number(number of nucleons)


What element has the same amount of neutrons and electrons?

There are several such elements. Examples are helium and carbon.


Are hydrogen -3 and helium -3 isotopes the same element?

no they are not the same element bc isotopes have the same amount of protons but not the same amount of neutrons or electrons! -tabbyg


What is the smallest unit of an element that maintains of that element?

The Atom is the smallest particle of an element that has characteristics of that element. The Atom consists of a certain amount of electrons, protons and usually neutrons. The amount of each of these sub-atomic particles is what makes an element into a Atom.


Isotopes are forms of the same element that differ in what?

Yes, isotopes of an element are the same element but with different numbers of neutrons in the nucleus and thus different atomic masses.


How do you calculate neutrons for elements in the periodic table?

them mass number of an element is the total amount of nuetrons and protons in the element , and the atomic number is the amount of protons ( and electrons) in the element simply subtract the atomic number from the mass number and you'll have the number of neutrons in the element hope this helped x


Can you find out the number of electrons by adding protons and neutrons?

To find out the number of electrons in an element you must add the protons and neutrons and subtract that number with the atomic mass, this will determine the amount of electrons because the unknown element could be an isotope and have more than the normal amount of electrons of the non isotope element.


Is it true The number of neutrons in an atom is referred to as the atomic number of that element?

No, the atomic number refers to the protons of an atom, and for the most part the electrons. The atomic mass refers to the neutrons of an element in a way; the atomic mass consists of protons and neutrons, so if you subtract the amount of protons from the atomic mass, you get the amount of neutrons. For example oxygen has an average atomic mass of 16.01 and has 8 protons, so 16.01 atomic mass-8 protons=8.01 average neutrons. Now this is just for the average amount of neutrons, which is changed by isotopes (atoms with different amounts of neutrons).