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8. Mass number is the number of neutrons plus the number of protons. The number of protons gives the atomic number.

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Q: An atom with a mass number of 18 that contains 10 neutrons would have the atomic number of what?
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What is the atomic mass number of an atom of sodium that contains 12 neutrons?

The atomic mass number of an atom is the sum of its protons and neutrons. Sodium typically has 11 protons, so if the atom has 12 neutrons, the atomic mass number would be 23 (11 protons + 12 neutrons).


If an atoms contains 11 protons and 12 neutrons its atomic number is?

The atomic number is determined by the number of Protons. So in this case it would be 11 (Sodium). The mass number is the total of protons and neutrons, so in this case 23. So this isotope of sodium would be 23Na.


What is the superscript and subscript of the nuclide of hafnium that contains 107 neutrons?

The superscript is the atomic mass number, which is the sum of protons and neutrons. The subscript is the atomic number, which is the number of protons. For a hafnium nuclide with 107 neutrons, the superscript would be 180 (107 neutrons + 73 protons) and the subscript would be 73.


How would you explain how to determine the number of neutrons and atom contains if you know its mass and its atomic number?

SHow your work


To find the number of neutrons in an atom you would subtract what?

You would subtract the atomic number from the mass number.


Phosphorus has an atomic mass of 31 and an atomic number of 15 the number of neutrons must be?

The number of neutrons in an atom can be calculated by subtracting the atomic number from the atomic mass. For phosphorus with an atomic number of 15 and an atomic mass of 31, the number of neutrons would be 31 - 15 = 16 neutrons.


Subtracting the Atomic number from the atomic mass?

To find the number of neutrons in an atom, you would subtract the atomic number (number of protons) from the atomic mass (sum of protons and neutrons). The difference between the atomic mass and the atomic number gives you the number of neutrons in the atom.


How many neutrons are in an isotope of lithium if it has an atomic mass of ten?

An isotope of lithium with an atomic mass of ten would have an atomic number of 3, meaning it has 3 protons. To find the number of neutrons, subtract the atomic number from the atomic mass: 10 (atomic mass) - 3 (atomic number) = 7 neutrons. Therefore, an isotope of lithium with an atomic mass of ten would have 7 neutrons.


What element has atomic mass of 16 and 8 neutrons?

The element with an atomic mass of 16 and 8 neutrons is oxygen. Oxygen has 8 protons in its nucleus, giving it an atomic number of 8. By subtracting the number of protons from the atomic mass, we can determine the number of neutrons, which is 8 in this case.


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

The number of neutrons can be calculated by subtracting the atomic number from the atomic weight. In this case, for oxygen with an atomic number of 8 and an atomic weight of 18, it would have 10 neutrons (18 - 8 = 10).


Boron has an atomic mass of 11 and an atomic number of 5 so the number of neutrons must be?

The number of neutrons in an atom is calculated by subtracting the atomic number from the atomic mass. In this case, for boron with an atomic mass of 11 and atomic number of 5, the number of neutrons would be 6.


What is the atomic symbol atomic number and atomic mass of an atom that has 27 protons 27 neutrons and 27 electrons?

The atomic number of an atom is the number of protons, so this atom has an atomic number of 27, which makes it cobalt, with the symbol Co. The isotope of cobalt that contains 27 protons and 27 neutrons has a mass number of 54, which is the sum of the protons and neutrons in the nucleus of the atom.