Please answer the following questions.
Which of the following are pure substances?
If an unkown substance CANNOT be broke down into simpler substances, it is?
What is the symbol for aluminum?
The symbol Au is the symbol for
Water is a compound because it:
Whcih of the following is a characteristic of a mixture:
When a physical change in a sample occurs, which of he following does NOT change:
How do changes in temperature usually affect the viscosity of a liquid?
List four physical properties of a material?
List the signs of a chemical change?