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Questions and Answers
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?
- Carbon and nitrogen
- Oxygen and silicon
- Nitrogen and hydrogen
- Hydrogen and helium (correct)
What is the primary distinguishing factor between nonmetals and metals?
What is the primary distinguishing factor between nonmetals and metals?
- Acidity and basicity of oxides
- Color and state at room temperature
- Conductivity and pliability
- Density and electronegativity (correct)
What are the primary uses of nonmetallic elements mentioned in the text?
What are the primary uses of nonmetallic elements mentioned in the text?
- Conductors of heat and electricity
- Building blocks for life and integral to various industries (correct)
- Formation of basic oxides and pliability in industries
- Energy production and metal manufacturing
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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