Atomic symbol notation question

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In atomic symbol notation, the nucleon number is placed at the top left of the element symbol, while the atomic number is positioned at the bottom left. This format is standardized by IUPAC guidelines, as outlined in the Red Book. The Cambridge curriculum aligns with these IUPAC conventions, ensuring consistency in scientific communication. Understanding this notation is crucial for accurately representing elements in chemistry. Correct notation is essential for clarity in scientific discussions.
chwala
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considering the symbol of an element, under the cambridge curriculum , is the nucleon number written on top or at the bottom on the left side of the element?
 
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It is not a matter of the Cambridge curriculum, correct notation is defined by IUPAC in the Red Book:

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