5. Which of the following describes an element? A. The simplest substance, B. It can be broken down into other types of substances. C. It can be separated through a chemical process. D. It is composed of two or more types of atoms. 6. Which of the following statements correctly describes a compound? 1. It can be broken down into a simpler type of matter by chemical means. II. It has unique properties that are different from the properties of its individual elements. III. It is composed of atoms of two or more elements that bond together. IV. It is composed of atoms of the same kind. A. I, II, III, IV B. I, II, III only C. I, II, IV only D. II, III, IV only 7. Which of the following will be the result of compound if Hydrogen gas and oxygen gas combine? A. Hydrogen peroxide B. Salt C. Sugar D. Water 8. What elements made up the compound Carbon Dioxide? A. Carbon and Carbon B. Carbon and Oxide C. Carbon and Oxygen D. Carbon and Hydrogen 9. Which of the following is correctly matched? I. Nitrogen: Element: Nitrous Oxide: Compound II. Iron: Element: Rust: Compound III. Mercury: Element: Copper: Compound IV. Oxygen: Element: Water: Compound A. I, II, III, IV B. I, II, III only C. I, II, IV only D. I and II only 10. Sodium is a silvery solid that reacts violently with water and chlorine. When they combine to form the compound sodium chloride known as salt, there is a fundamental change in the properties. Salt is often added to our food when cooking and it is safe to eat. Which of the following statements supports the idea presented? A. True to all compounds, they no longer have the properties of the elements that makes them up. B. True to some compounds, it maintains the properties of the elements that makes them up.​