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The atomic number of an isotope is the number of protons it contains, whereas the mass number is the total mass of the nucleus, which is the combined number of protons and neutrons in the nucleus. To find the number of neutrons, you must therefore subtract the atomic number of the isotope from the mass number of the isotope.

In the above example, the atomic number is 8 and the mass number is 18. This isotope is known as O18. The number of neutrons in the isotope is: Mass number - Atomic number = Number of neutrons

18 - 8 = 10

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14y ago
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7y ago

If the atomic number is 8, then it has 10 neutrons to give it an atomic weight of 18

With an atomic number of 8 it would be an isotope of oxygen - Specifically oygen-18 which makes up about 0.2% of all terrestrial oxygen.

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13y ago

Atomic weight = atomic number + number of neutrons

no. of neutrons = 18 - 8 = 10

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11y ago

There are 8 electrons, 8 protons and 10 neutrons in an atom of oxygen-18 isotope.

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Q: Sn isotope of oxygen has an atomic number of 8 and an atomic weight of 18. how many neutrons does it have?
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Related questions

Is 18 O an isotope?

Number of Neutrons = Atomic mass minus Atomic Number. Neutrons = 18[Atomic Mass] - 8[Atomic Number] Neutrons = 10


How many numders of neutrons and electrons does oxygen have?

Oxygen has 8 electrons and protons. The number of neutrons is different for each isotope: Number of neutrons = Atomic mass of the isotope - Number of protons


How many protons neutrons does oxygen have?

oxygen has 8 protons as its atomic number is 8. The number of neutrons depends on the isotope. O-15 isotope will have 7 neutrons, O-16 isotope will have 8 neutrons. (Note: Mass number = Number of protons + number of neutrons)


How many neutrons and electrons does an oxygen atom have?

Oxygen has 8 protons . The number of neutrons depends on the isotope. Oxygen-15 isotope has 7 neutrons and oxygen-16 isotope has 8 neutrons. (Note: Mass number = Number of protons + number of neutrons)


What is the atomic number for an isotope with 8 protons 8 electrons and 11 neutrons?

The atomic number is 8. It is a non-existent isotope of oxygen.


The number of neutrons contained in oxygen-17 which has an atomic number of 8 is?

It has 10 neutrons since the atomic number is equal to the number of protons and the isotope number is the number of neutrons and protons together.


What is the atomic mass mass number of oxygen?

The atomic mass number of oxygen is 16.0. --------- The mass number is the sum of neutrons and protons in the atomic nucleus and is different for each isotope of any element. For example the isotope oxygen-16 has the mass number 16. After IUPAC Tables from 2009 the atomic weight of oxygen is [15,99903; 15,99977]. The conventional (abridged) atomic weight is 15.999 amu.


What is the atomic number for the oxygen atom?

The mass number is the sum of neutrons and protons in the atomic nucleus and is different for each isotope of any element. For example the isotope oxygen-16 has the mass number 16. The atomic weight of oxygen (not Atomic Mass) is [15,99903; 15,99977] after the IUPAC Tables - 2009. The atomic number of oxygen is 8.


What describes an isotope of the commonly occuring oxygen atom which has 8 electrons 8 protons and 8 neutrons?

what is an isotope? An isotope is a different form of an element's atom that does not change the identity of the atom. I believe that the isotope would be Oxygen-16 due to the atomic mass of such an atom.


Was is the atomic mass number for oxygen?

The mass number is the sum of neutrons and protons in the atomic nucleus and is different for each isotope of any element.For example the isotope oxygen-16 has the mass number 16.The mass number is not the atomic mass !!


What are the atomic and mass numbers of oxygen?

The mass number is the sum of neutrons and protons in the atomic nucleus and is different for each isotope of any element. For example the isotope oxygen-16 has the mass number 16. The atomic weight of oxygen (not atomic mass) is [15,99903; 15,99977] after the IUPAC Tables - 2009. The atomic number of oxygen is 8.


What is the Atomic mass is the number of?

The mass number is the sum of neutrons and protons in the atomic nucleus and is different for each isotope of any element. For example the isotope oxygen-16 has the mass number 16.