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All oxygen atoms have 8 protons. Most oxygen atoms have 8 neutrons as well. On the Periodic Table, oxygen's average atomic mass is 15.9994. Most oxygen, therefore is 168O or O-16. However, there are very small amounts of oxygen's additional isotopes, which have a different number of neutrons (but again, all oxygen has 8 protons.) This causes the weighted average of all the isotopes to "drift" away from being a whole number.

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What is the definition of atomic mass number?

Atomic Mass is the sum of the number of protons and neutrons in the atom, plus any additional mass conferred by electrons. (Since electrons are roughly 1/1837th of a proton's mass, this additional mass is minuscule and is only represented in atoms that have atomic numbers at the higher end of the table.) It should be an integer/whole number.The reason that most elements have a number with decimals for their atomic mass numbers on the Periodic Table is because those numbers average all of the different isotopes of the element in proportion to how common they are. For example, Oxygen has an atomic mass number of 15.999 since the overwhelming majority of oxygens have 8 protons and 8 neutrons for a total atomic mass number of 16, but there are some rare oxygens with 8 protons and 7 neutrons for a total atomic mass number of 15. Once these are averaged, since the 16s are much more common, the resulting number is 15.999.


How do you calculate the number of neutrons in cobalt?

The number of neutrons in any element is equal to mass number - atomic number. So,number of neutrons in cobalt is = 58 - 27 = 32. therefore, number of neutrons in cobalt is 32.


What is the number of neutrons of californium?

For each isotope the number of neutrons is different.Number of neutrons = Mass number of an isotope - 98


Does carbon have the same number of protons neutrons and electrons?

Carbon has 6 protons an 6 electrons (in a neutral state). The number of neutrons is: - for 12C: 6 neutrons - for 13C: 7 neutrons - for 14C: 8 neutrons For artificila isotopes: number of neutrons = mass number - atomic number


To find the number of neutrons is an isotope start with the mass number and what?

The mass number of an isotope is the number of neutrons and protons in the isotope, let this be p +n = (mass number). To find the number of neutrons you need the atomic number (number of protons), let this be p. You then subtract the two: mass number - atomic number = no. of neutrons p + n - p = no. of neutrons = n

Related Questions

What is oxygens number of protons and neutrons?

oxygen has 8 protons


What is oxygens atomic number?

Oxygen is in p block. it is a useful gas. oxygens atomic number is 8.


What is the difference between carbonates and carbonites?

number of oxygens


What is the definition of atomic mass number?

Atomic Mass is the sum of the number of protons and neutrons in the atom, plus any additional mass conferred by electrons. (Since electrons are roughly 1/1837th of a proton's mass, this additional mass is minuscule and is only represented in atoms that have atomic numbers at the higher end of the table.) It should be an integer/whole number.The reason that most elements have a number with decimals for their atomic mass numbers on the Periodic Table is because those numbers average all of the different isotopes of the element in proportion to how common they are. For example, Oxygen has an atomic mass number of 15.999 since the overwhelming majority of oxygens have 8 protons and 8 neutrons for a total atomic mass number of 16, but there are some rare oxygens with 8 protons and 7 neutrons for a total atomic mass number of 15. Once these are averaged, since the 16s are much more common, the resulting number is 15.999.


What are the element number of neutrons?

Number of Neutrons = Mass number - Number of Protons


Finding the number of neutrons in an element?

To find the number of neutrons in an element, subtract the atomic number (number of protons) from the mass number (sum of protons and neutrons). Neutrons do not carry a charge and help stabilize the nucleus of an atom.


How do you calculate the number of neutrons in cobalt?

The number of neutrons in any element is equal to mass number - atomic number. So,number of neutrons in cobalt is = 58 - 27 = 32. therefore, number of neutrons in cobalt is 32.


What is the number of neutrons for californium?

The number of neutrons is different for each isotope:Number of neutrons = Mass number of an isotope - 98


What is the number of neutrons of californium?

For each isotope the number of neutrons is different.Number of neutrons = Mass number of an isotope - 98


Where is the location of the neutrons in a periodic table?

Neutrons are not given directly on the periodic table. However the number of neutrons can be indirectly calculated. Mass number = Number of protons + number of neutrons


How can an atoms number of neutrons be determined?

Mass number-Atomic Number= Number of neutrons


What is the number of neutrons in phosphorus-31?

the number of neutrons is mass