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Amatch has about 21 milligrams of red phosphorus coating the tip. how many atoms of phosphorus is this?
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Timed ! in which of these statements are protons, electrons, and neutrons correctly compared? quarks are present in protons and neutrons but not in electrons. quarks are present in protons, neutrons, and electrons. quarks are present in neutrons and electrons but not in protons. quarks are present in protons and electrons but not in neutrons.
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What are some examples of properties scientists use to describe matter?...
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