1. Venn Diagram: Let's Compare and Differentiate Group the following according to their similarities and differences. Choose your answer inside the box Example: 17 is A. (Element) A. Elements (C. Similarities B. Compounds 17. Made up of one kind of 21. Essential to life atom 22. Pure substance 18. Made up of molecules 23. Acids, bases, salts 19. Can be broken by 24. Metals, non-metals, chemical means Metalloids 20. Cannot be broken down 25. Oxygen by chemical process 26. Carbon dioxide