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The difference between proton number (which is atomic number) and nucleon number, which is the number of protons and neutrons in an atom's nucleus, is the number of neutrons in the nucleus of a given nuclide. Nucleons are the components of an atomic nucleus. We know that both protons and neutrons make up an atom's nucleus. So the number of nucleons, which is the number of protons and neutrons, minus the number of protons, will equal the number of neutrons in the atomic nucleus.

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The proton number is simply the number of protons. For example, the element helium has a proton number of two. Every helium atom has exactly two protons in its nucleus. The term nucleon refers to the two kinds of particles found in an atomic nucleus, those being protons and neutrons. The nucleon number is the number of nucleons. The nucleon number for helium is four, because helium has two protons and two neutrons in its nucleus. Most elements exist in a variety of forms, having different numbers of neutrons (but the same number of protons, since the proton number is what defines an element).

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A proton is a negatively charged atom, and a neutron is a neutrally charged atom, so their numbers and amounts usually differ because the amount of both creates that certain element.

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The nucleon number of an atom includes both protons and neutrons because they are both found in the nucleus of an atom.

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Q: Why is proton number of an atom of an element different from the nucleon number of an atom of an element?
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Isotopes exist because atoms of the same element can have a different numbers of what?

Isotopes are different atoms of the same element with the same number of protons (proton number) but different in number of neutrons. Given that nucleon number is equal to the sum of proton and neutrons in the nucleus of an atom, isotopes have different nucleon number due to difference in number of neutrons.


How can you get the nucleon number?

add the number of nucleus and proton number


What do you find when you subtract the proton number from the nucleon number?

In chemistry and physics, a nucleon is one of the two particles that make up the atomic nucleus. Protons are one of the nucleons, Neutrons are the other nucleon.Thus by subtracting the number of Protons in the nucleus (the Proton number) from the total number of nucleons (the nucleon number) you will get the total number of Neutrons (the neutron number) in the atoms nucleus.


What can you conclude about the particle labeled 1 1 P?

It has one nucleon. It has no neutrons. It has one proton.


Do mass of proton vary for different elements?

The number of protons is different for each element, but the mass of each individual proton is always the same.


Is the protron a nucleon?

Yes, the proton is a nucleon. The term nucleon is used to speak of component particles of the nucleus of an atom. That means either a proton or a neutron. The term nucleon can be applied to either the proton or neutron when speaking of these particles as building blocks of atomic nuclei. Use the link to the related question below for more information.


The element with a proton number 12 has similar chemical properties to the element with the proton number?

It has similar properties to the element with proton number 20, which is calcium.


How is element with atomic number 82 in the periodic table different from the element with atomic number 81?

one more proton, and electron


How is the element With atomic number 82 in the Periodic table Different from the element With atomic number 81?

one more proton, and electron


What element has the proton of 15?

The element with a proton number of 15 is Phosphorus; P


The atomic number of an element determines its?

The atomic number of an element is determined by the number of protons in its nucleus.


Isotopes of the same element differ in the number of what-?

Only the neutron number is different, same proton and electron number.