Chapter 2: Atoms, Ions, and the Periodic Table
The number of protons and neutrons in an atom of magnesium-25 is: A) 25 protons and 12 neutrons. D) 12 protons and 13 neutrons. ... The ions of most main-group elements have the same number of _____ as the noble gas that is closest to them in the periodic table. A) neutrons D) protons and electrons. B) protons E) neutrons and electrons. C ... ................
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