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which is the symbol for the following monatomic ion?

8 protons and 10 electrons

1 answer

The 8 tells you to look on the periodic table at element #8, which is oxygen. Neutral oxygen has 8 protons and 8 electrons. Since this question shows oxygen with 10 electrons, it means it must have a -2 charge. The symbol is O=.(O with a negative 2 charge); i.e., the oxide ion.
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