QuestionClassify these as physical or chemical properties: 1. Gold is shiny. 2. Gold melts at $1064^{\circ} \mathrm{C}$. 3. Gold conducts electricity. 4. Gold reacts with sulfur to form a black sulfide.

Studdy Solution
The fourth property says "When gold reacts with yellow sulfur, a black sulfide compound forms". This describes how gold interacts with another substance (sulfur), and results in a change in its composition (formation of a new compound). Therefore, it is a chemical property.
$$\text{When gold reacts with yellow sulfur, a black sulfide compound forms} \rightarrow \text{Chemical Property}$$So, the properties are classified as follows1. Gold is shiny - Physical Property2. Gold melts at $1064^{\circ} \mathrm{C}$ - Physical Property3. Gold is a good conductor of electricity - Physical Property4. When gold reacts with yellow sulfur, a black sulfide compound forms - Chemical Property