What is the atomic number of gold?

Prepare for the ASVAB Skilled Technical Test. Practice with flashcards and multiple choice questions, each question offers hints and explanations. Get ready for your exam!

Multiple Choice

What is the atomic number of gold?

Explanation:
Atomic number is the number of protons in the nucleus, and that count uniquely identifies an element. For gold, the nucleus contains 79 protons, so its atomic number is 79. The mass number you might see (for common isotopes) combines protons and neutrons and can vary, but the atomic number stays fixed at 79. In a neutral atom, there would also be 79 electrons to balance the charge.

Atomic number is the number of protons in the nucleus, and that count uniquely identifies an element. For gold, the nucleus contains 79 protons, so its atomic number is 79. The mass number you might see (for common isotopes) combines protons and neutrons and can vary, but the atomic number stays fixed at 79. In a neutral atom, there would also be 79 electrons to balance the charge.

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