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23 Protons and 28 Neutrons. The atomic number is always equal to the number of protons in an element. The element is vanadium (symbol V). Any atom with 23 protons is be vanadium, but some vanadium atoms will have more or less than 28 neutrons. The mass number is the sum of the number of protons and neutrons together, and this can vary for the same element (called isotopes). To find the number of neutrons, just subract the atomic number from the mass number.

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16y ago
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14y ago

51 protons.
number of protons = atomic number

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14y ago

the protons and electron are the same as the atomic number if the atom was neutral

Protons 23

Electrons 23

Nucleus 28

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14y ago

It would have 50 protons. When somone says atomic number you can save yourself some confusion and straight away think of it as the number of protons that are in the atom.

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14y ago

23 Protons

28 Neutrons

51 Relitive Atomic Mass

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13y ago

23,

The number of protons (and thus the total [positive] charge) determines the atomic number of an element.

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11y ago

If the atomic number is 51, then there are 51 protons and 51 electrons. The mass number of the element should be known to find out the number of neutrons.

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13y ago

51

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Q: How many protons does an atom with an atomic number of 51?
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How many protons does an atom have if its atomic number is 4?

The atomic number IS the number of protons in the atom's nucleus.


Can an atomic number tell you how many protons an atom has?

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