Physical properties distinguish one object from another, can be observed or measured without changing the substance. Chemical Properties describe how a substance unites with other substances to form a new substance.
What is the difference between elements and compounds?
Molecules: groups of two or more atoms linked together.
Different compounds can be formed from the same elements Examples: Carbon, Hydrogen, and Oxygen Make: Sugar Formaldehyde Aspirin Rubbing Alcohol
Match the term to what it means: Molecular Mass Pure Substances Elements and Compounds can be Mixtures What are used to separate mixtures Pure Substances Sum of the atomic masses of all the atoms Chemical composition is the same throughout Made of several elements that are physically mixed Physical Methods