An element has 8 protons and 8 neutrons in its nucleus and 8 electrons revolving around the nucleus. What is the atomic number and atomic mass of this element? The atomic number is 16 and the atomic mass is 8. The atomic number is 8 and the atomic mass is 8. The atomic number is 8 and the atomic mass is 16. The atomic number is 16 and the atomic mass is 4. The atomic number is 4 and the atomic mass is 16.
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