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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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15y ago
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13y ago

The atomic number of an element, i.e. the element's number on the periodic table is the also the number of protons that element has. For example, Oxygen is number 8 on the table and has 8 protons.

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12y ago

To find the number of protons in an atom, you look at the Atomic Mass of the element. The atomic mass is usually located right above the element symbol. It is always a whole number. The atomic number is the number of protons and electrons in an atom.

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14y ago

The number of protons determine what atom it is and vice versa.

For example oxygen has 16 protons because its atomic weight is 16.

If an atom doesnt have 16 protons, it cant be oxygen.

Use the periodic table to find out the atomic weights of diffrent atoms.

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14y ago

Look at the atomic number on the periodic table

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13y ago

look at its atomic number on the periodic table.

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11y ago

To find out the number of protons in a atom, you must look at the atomic number. That is the amount of protons and electrons in an atom

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Q: How do you determine the number of protons in the nucleus?
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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.


What do the protons of the nucleus of an atom determine?

Number of protons or the atomic number of an atom determines what is the element.


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

try counting


How is the nucleus related to the periodic table?

The nucleus contains the protons and neutrons. The number of protons determines the atomic number of the element and the number of protons and the number of neutrons together determine the atomic mass.


How many protons are in the nucleus of the carbon atom?

Its electrons and protons are the same. just determine its electrons form its atomic number


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.


How do scients determine the atomic number of an atom?

the atomic number is determined by the number of protons in a nucleus.


What determent's an atoms identity?

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


Determine the number of protons?

The number of protons is equal to atomic number and the number of electrons (for a neutral atom).


The number of these will determine it's atomic number?

The atomic number of any atom is determined by the number of protons in the nucleus of the atom.