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Questions and Answers
What is the primary difference between a pure substance and a mixture?
What is the primary difference between a pure substance and a mixture?
- The presence of different elements
- The ability to be separated into components
- The uniform composition throughout (correct)
- The presence of metalloids
Which of the following elements is most abundant in the Earth's atmosphere?
Which of the following elements is most abundant in the Earth's atmosphere?
- Helium (He)
- Oxygen (O2)
- Nitrogen (N2) (correct)
- Argon (Ar)
What is the characteristic that distinguishes a metal from a non-metal?
What is the characteristic that distinguishes a metal from a non-metal?
- The presence of electrons in the outermost energy level
- The ability to conduct electricity (correct)
- The ability to form ions
- The presence of a noble gas configuration
Which type of mixture is characterized by a uniform composition throughout?
Which type of mixture is characterized by a uniform composition throughout?
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What is the term for an element that exhibits some properties of metals and some properties of non-metals?
What is the term for an element that exhibits some properties of metals and some properties of non-metals?
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