Santa Monica College

SMC 2026 Spr CHEM 9 (1387,1388) Everyday Chemistry (O) Chem 9 LECTURE FINAL 化学9讲座期末考试

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How many protons, neutrons, and electrons are there in a neutral atom of 19/9 F? 在一个19/9华氏度的中性原子中，有多少质子、中子和电子？

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