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The number of protons in an atom determines the chemical identity of that atom. (And only that, by the way.) We use the atomic number to state the exact number of protons in all atoms of a given element. Hydrogen has the atomic number 1 because every atom of hydrogen has exactly one proton. Also, every atom with exactly one proton is hydrogen. Helium is atomic number 2, and the same thing applies. All helium atoms have exactly 2 protons, and all atoms with exactly 2 protons are helium atoms. To determine the number of protons in a given atom, look at which element it is and find it on the Periodic Table or on a list of the elements. Then find its atomic number, which will be the exact number of protons in every atom of that element.

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Related Questions

What does the number of atoms in the nucleus determine?

Do you mean number of protons in a nucleus? The nucleus is part of an atom.


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How is the nucleus related to the periodic table?

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What does the number of protons in a atoms's nucleus determine?

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Protons in the nucleus?

Protons are positively charged subatomic particles found in the nucleus of an atom. They determine the element's identity by the number of protons present, known as the atomic number. The number of protons also influences the chemical properties of the element.


What an Atoms identity?

The number of protons in the nucleus of the atom determine its identity.


What does the number of protons in a nucleaus determine of an atom?

The number of protons in the nucleus of an atom determines the atomic number of the element to which the atom belongs.


What must you know about an atom to determine its mass number?

The number of protons and neutrons in its' nucleus.


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How do scients determine the atomic number of an atom?

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