An element
a. is identical to a compound
b. is made up of compounds
c. can combine with one or more other element to make a compound
d. exists only in a pure form as a single element, and never combines with other elements
e. more than one of these answers
C
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A. 4 M B. ?14 M C. 14 M D. ?1 × 1014 M E. 1 × 10-4 M
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Which of the following best matches the description?Relationship between available supply of a commodity or service and its price.
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