Chapter 1, Problem 1.41EP

Indicate whether each of the following characterizations of the elements copper and sulfur is true or false.

1. a. A mixture containing copper and sulfur can have a variable composition.
2. b. In a mixture of copper and sulfur, the two elements maintain their individual properties.
3. c. In a compound containing copper and sulfur, physical methods can be used to separate the substances present.
4. d. In a compound containing copper and sulfur, the two elements are chemically combined rather than physically combined.