Compounds, and Mixtures An element is a pure substance containing:
only one kind of atom
two or more kinds of atoms
two or more kinds of compounds
a mixture
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What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

In 2002, the rare earth elements mine in mountain pass, california was closed because

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.