the atom of element is made up of 11 protons 12 nuterons what is the valence
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The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass). Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons.
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The valency of that element is 1...
The element is Sodium...
Hope this satisfies you....
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