Question

In a correctly written symbol what would be located in the "A" position?

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atomic number


mass


number of neutrons


number of electrons

Answer 1

In a correctly written chemical symbol, the "A" position typically represents the mass number of the element. The mass number is the total number of protons and neutrons in the nucleus of an atom.

To clarify the relationships:
- The atomic number (usually denoted as "Z") is found in the "Z" position, which is typically in the lower left corner of the symbol.
- The mass number (the "A" position) is typically found in the upper left corner of the symbol.
- The number of neutrons can be calculated by subtracting the atomic number from the mass number (mass number - atomic number = number of neutrons).
- The number of electrons is typically equal to the number of protons in a neutral atom.

Therefore, the answer to your question is the mass.