Multiple choice general knowledge math & puzzles If two protons are removed from an oxygen nucleus, the result is: Carbon Neon Nitrogen Helium Reveal answer Fill a bubble to check yourself A Correct answer Explanation Oxygen has an atomic number of 8 (8 protons). If you remove two protons, the atomic number becomes 6. The element with atomic number 6 is Carbon. Neon has 10 protons, Nitrogen has 7, and Helium has 2.