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To find out how many neutrons are in any element, you must take the atomic mass of the element and subtract the atomic number/ the number of protons.

# of neutrons = atomic mass - # of protons

This is because the atomic mass of an element is the number of protons added to the number of neutrons. The atomic mass is measured in atomic mass units, where one proton has a mass of 1 amu and one neutron has a mass of 1 amu. Elements also have electrons, however their mass is negligible, which means that it can be ignored because it is minor.

In the case of iodine, it's atomic mass is approximately 127 (126.9). It's atomic number, which is also the number of protons and the number of electrons, is 53. Thus, the number of neutrons is:

127 - 53 = 74

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14y ago
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6mo ago

To find the number of neutrons in iodine, subtract the atomic number (found on the Periodic Table) from the Atomic Mass of iodine. Iodine has an atomic number of 53, and the average atomic mass is around 126.9. Therefore, the number of neutrons in iodine is approximately 74 (126.9 - 53).

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Q: How do you find out how many neutrons are in iodine?
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How many protons neutrons and electrons does ion have?

The mass number for iodine is 131, which is the sum of the protons and neutrons. Iodine has 53 protons and 53 electrons, if neutral. To find how many neutrons iodine has subtract 53, the number of protons from the mass number of 131. This shows that iodine has 78 neutrons.


How many neutrons are in an atom of I?

A typical atom of iodine contains 74 neutrons.


How many neutrons are there in iodine?

There are varying isotopes of iodine, but typically an iodine atom has 74 neutrons.


How many neutrons are Iodine?

53


How many protrons and neutrons are in iodine?

you can find the number of protons by looking at the atomic number (53), as the number of protons does not change between isotopes. You can find the number of neutrons by subtracting the atomic number from the Atomic Mass (131), therefore, iodine-131 has 53 protons and 78 neutrons.


How many protons neutrons and electrons does iodine-122 have?

The isotope iodine-122 has 53 protons and electrons and 69 neutrons.


How many neutrons and protrons are in iodine-131?

you can find the number of protons by looking at the atomic number (53), as the number of protons does not change between isotopes. You can find the number of neutrons by subtracting the atomic number from the atomic mass (131), therefore, iodine-131 has 53 protons and 78 neutrons.


How many neutrons are in an atom I?

A typical atom of iodine contains 74 neutrons.


How many protons and neutrons are found in the iodine 129 atom?

The iodine-129 atom has 53 protons and 76 neutrons. This is because the atomic number of iodine is 53 (number of protons) and the atomic mass of iodine-129 is 129 (sum of protons and neutrons).


What element has 53 protons and 74 neutrons?

The element with 53 protons is iodine (I). Adding 74 neutrons to iodine gives the isotope iodine-127.


How many protons electrons and neutrons does iodine have?

This question is incomplete. One cannot say how many neutrons an atom of iodine has unless one also specifies which isotope of iodine one is referring to. Since the atomic number of iodine is 53, that means that there are 53 electrons and 53 protons in the neutral atom.


What element with 74 neutrons?

Iodine (I) has 53 protons and 74 neutrons.