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The number of protons in the nucleus is equal to the atomic number of that atom. Said another way, the atomic number of any element is the number of protons in the nucleus of any atom of that element.

It might be helpful to consider some examples, and if we look at Mercury, we'll see it has an atomic number of 80. All atoms of mercury have 80 protons in them. Aluminum has the atomic number of 13, so all atoms of it have 13 protons in them. Uranium, which has atomic number 92, has 92 protons in all of its atoms.

The number of electrons and neutrons in a given atom of a given element can vary for a number of reasons, and these characteristics are considered separately. The number of electrons in any atom will match the number of protons in the nucleus of that atom only if the atom is a neutral one. Some atoms loan out or borrow electrons, and then they become what are called ions. The number of neutrons can vary, too, and we use the term isotope to talk about atoms of a given element having different neutron counts.
The atomic number indicates the number of protons in an atom's nucleus.
The number of protons in the nucleus is the atomic number of the atom.

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Related Questions

The number of protons in an atom's nucleus is the?

The number of protons in an atom's nucleus is the Atomic number.


What is the particle that identifies a atom?

The number of protons in an atom's nucleus determines its chemical identity.


Number of electrons and protons in a nucleus?

The number of protons in a nucleus depends on which element it is. ( The number of protons is the decider as to which element it is. ) The number of electrons in an atom is the same as the number of protons in the nucleus, but none of the electrons are in the nucleus. Rather, they orbit around the nucleus like planets round a star.


How did you find out protons are in the nucleus?

The number of protons in the atomic nucleus is equal to atomic number.


What is the atomic number always equal to?

The atomic number reflects the charge number of the nucleus. It is always equal to the number of protons found in the nucleus.


Number of protons in silver nucleus?

There are 47 protons in Silver's atomic nucleus. The number of protons is the same as the atomic mumber.


What is the correspondent to the number of protons inside the atomic nucleus?

The number of protons in the nucleus is the same as the atomic number.


What is the atomic number of an elements based on?

The number of protons in the nucleus of an atom.


How do you find the number of protons in an elements nucleus?

The number of protons in an elements nucleus is the same number at the atomic number.


Can the nucleus hold two or more protons?

A nucleus contain protons and neutrons. A nucleus can hold more protons - the number is equal to atomic number.


The number is the number of protons in the nucleus?

atomic number is the number of protons


What determines an attoms atomic number?

The number of protons.