Where is the atomic mass number indicated on a chemical symbol according to the material?

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Prepare for the ACS Organic Chemistry Test with multiple choice questions and comprehensive explanations. Utilize flashcards for quick learning and gain confidence for your exam day!

Multiple Choice

Where is the atomic mass number indicated on a chemical symbol according to the material?

Explanation:
The atomic mass number A is the total number of protons and neutrons in a nucleus, and it is shown as a superscript to the left of the element symbol (in the upper left corner). The atomic number Z, counting protons, is placed as a subscript to the left (lower left), and any electric charge appears as a superscript to the right (upper right). So, the mass number is positioned in the upper left corner to indicate A.

The atomic mass number A is the total number of protons and neutrons in a nucleus, and it is shown as a superscript to the left of the element symbol (in the upper left corner). The atomic number Z, counting protons, is placed as a subscript to the left (lower left), and any electric charge appears as a superscript to the right (upper right). So, the mass number is positioned in the upper left corner to indicate A.

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