The number of neutrons, protons and electrons of oxygen in nitric acid.

Hydrogen: 1 electron, 1 proton, 0 neutrons.
Nitrogen: 7 electrons, 7 protons, 7 neutrons.
Oxygen: 8 electrons, 8 protons, 8 neutrons.
We calculate in total: 1 * (1e, 1p, 0n) + 1 * (7e, 7p, 7n) + 3 * (8e, 8p, 8n) = 32e, 32p, 31n.
Answer: the nitric acid molecule contains 32 electrons, 32 protons, 31 neurons.



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