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2 &12. Atomic structure (2)

For each question choose the answer you consider to be the best.1. What is the symbol for a species that contains 8 protons, 9 neutrons and 10 electrons?A. N3− B. F−C. F−D. O2−2. How many protons, neutrons and electrons are present in an atom of 40Ar?3. Which species represents a pair of isotopes? A. W and XB. X and Y

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2 &12. Atomic structure (2)