Options are not given in the question, so the complete question is as follows:
The element of gold has a consistent melting point and color regardless of the physical changes that it goes through. This identifies gold as what type of substance?
A. A mixture
B. A physical property
C. A pure substance
D. A compound
Answer:
C. A pure substance
Explanation:
There are basically two types of substances pure substance and mixtures. The composition and properties remain constant throughout the sample in pure substance while in mixture, composition, and properties vary.
Gold having a consistent melting point and color is identified as a pure substance because a pure substance does not change its properties and composition throughout the sample.
Hence, the correct option is "C. A pure substance ".
