Answer:Let's complete the sentences by filling in the appropriate word from the list: 1. Pure substances cannot be separated by physical or chemical means.2. Elements are abbreviated with symbols.3. Elements are organized on the Periodic Table, which consist of one or more according to their atomic number.4. Two or more elements chemically combined make up a compound.5. Carbon is an example of an element and carbon dioxide is an example of a compound.6. Elements and compounds are called pure substances because they have a unique set of chemical and physical properties.