객관식
Which element is represented by an atom with 3 protons, 4 neutrons, and 3 electrons?
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Subatomic Particles (Simplified)
뒤로4. Atoms and Elements
Subatomic Particles (Simplified)
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- 객관식
How many atoms are contained in 0.230 g of sodium, Na? The mass of one sodium atom is 22.99 amu.
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