5 Questions
What is the primary characteristic that distinguishes a pure substance from a mixture?
Composition
Which of the following is an example of a heterogeneous mixture?
Sand and water
What is the difference between metals and non-metals?
Metals are good conductors of electricity, non-metals are poor conductors
Which of the following elements is a metalloid?
Silicon
What percentage of the Earth's atmosphere is composed of nitrogen?
78%
Test your understanding of the chemical classification of matter, including pure substances, mixtures, elements, compounds, and the abundance of elements in the atmosphere. Learn about metals, non-metals, and metalloids.
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