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Which two elements make up about 98% of the observable ordinary matter in the universe by mass?
Which two elements make up about 98% of the observable ordinary matter in the universe by mass?
What is the primary distinguishing factor between nonmetals and metals?
What is the primary distinguishing factor between nonmetals and metals?
What are the primary uses of nonmetallic elements mentioned in the text?
What are the primary uses of nonmetallic elements mentioned in the text?
Which nonmetallic element is mentioned as a significant component of the Earth's crust, atmosphere, oceans, and biosphere?
Which nonmetallic element is mentioned as a significant component of the Earth's crust, atmosphere, oceans, and biosphere?
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Which of the following statements about nonmetals is true?
Which of the following statements about nonmetals is true?
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