a Fe c. Na c. Oil 12. Which of the following is correctly matched? a Gold: Element: Silver: Compound c. Sugar: Element: Salt: Compound b. Oxygen: Element: Salt: Compound d. Water: Element: Hydrogen: Compound 13. Which of the following is an element? b. He d. Pz 14. Which of the following ingredients is an element? a, Calcium b. Carbohydrate d. Protein 15. Which of the following ingredients is a compound? a. Calcium b. Calcium chloride c. Magnesium d. Manganese 16. Boron, carbon, nitrogen, and oxygen are examples of a compounds b. elements c. ingredients d. nutrition facts 17. Carbon dioxide, sodium chloride, sugar and salt are examples of a. compounds b. elements c. ingredients d. nutrition facts 18. 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 19. How do you classify elements from compounds? a compounds are composed of one molecule b. compounds are composed of two or more compounds c. compounds are composed of two or more molecules d. elements are single atom substances 20. Why is it important to be familiar with elements and compounds? a to be praised by others of knowing them c. to enumerate elements and compounds b. to classify them accordingly d. to tell others you know them​