Final answer:
The correct chemical symbol for an atom with 23 protons and 29 neutrons is V.
Step-by-step explanation:
The correct chemical symbol for an atom with 23 protons and 29 neutrons is V. The number of protons in an atom determines its atomic number, and the symbol for Vanadium is V with an atomic number of 23. The number of neutrons can vary, but it does not affect the chemical symbol.
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