Use the periodic table to identify which statement best describes carbon dioxide, CO2?
Think about the similarities and differences between elements and compounds. Which of the following is true?
Glucose has the chemical formula C6H12O6. Which of the following is true about one molecule of glucose?
Elements and compounds are similar in some ways and different in others. Select THREE correct answers.
Bill has iron flakes, salt, water, and bromine. He makes a table to describe all the different substances he has made and to analyze the structure of these substances.
Select TEN correct boxes in the table that describe each substance.

Classify each substance as an element, a compound, or a molecule. Move each answer to the correct box. Each answer may be used more than once.
Helium (He)
Water (H2O)
chlorine (Cl2)
ammonia (NH3)
nitrogen gas (N2)
Element
Compound
Molecule