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1. The Atomic Mass of oxygen is [15,99903; 15,99977].

2. The mass number is the sum between the number of neutrons and protons in the atomic nucleus and this value is specific for each isotope of a chemical element.

For the isotope 16O the mass number is 16.

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Q: What is the atomic mass number of an oxygen atom?
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What is the atom with atomic number 8 and mass number sixteen?

Atomic number 8 and mass number sixteen is Oxygen


He atomic number of oxygen is 8 What is the mass number of an oxygen atom with 7 neutrons?

The atomic mass of oxygen (8 protons + 7 neutrons) is 15.For finding the atomic mass of any element, we have to get sum of number of protons & number of neutrons. Atomic Mass (A) : p+n.p = no. of protons.n = no. of neutrons.


If an atom had an atomic number of 8 and has an atomic mass of 19 is the atom considered an isotope?

Yes. The element with an atomic number of 8 is oxygen and it's average atomic mass is 15.9994 (rounded to 16).


What is the atomic mass of an oxygen atom?

The atomic mass of an oxygen atom depends on which isotope of oxygen you are referring to. The AVERAGE atomic mass is approximately 15.9994


How do you get the mass number of an atom?

Look on the Periodic Table. The bottim number is the Atomic Mass and the top is the atomic number. ex. The atomic mass for O (oxygen) is 16.


How many nucleons does an oxygen with a mass number of 17 and an atomic number of 8 have?

There are no 'nucleons' in an Oxygen atom. You mean 'neutrons'. As all the mass of an atom is in its nucleus (made up of 'protons' and 'neutrons') and as the Atomic Number is the count of how many 'protons' there are, if you subtract the Atomic Number form the Atomic Mass, you get the number of 'nutrons'. 17-8=9.


What is the number of neutrons in an atom affects the atomic what?

The number of neutrons in an atom can affect the atomic mass of an atom.


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.


Is it true that The atomic mass is equal to the atomic number?

No, the atomic mass number is the number of protons plus the number of neutrons. The atomic mass of an atom is the total mass in a motionless atom.


What do you get if you subtract the atomic number from the mass number for a particular atom?

mass no - atomic no = number of neutrons in an atom.


Atomic mass is determined by the number of protons plus the number of?

Atomic mass is determined by the number of protons and neutrons in an atom's nucleus.


What is the atomic number for an oxygen atom that has 10 neutrons in it's nucleus?

The mass number =18