3. Which of the following substance is an element? *
2 points
a. carbon dioxide
b. iron
c. salt
d. sugar
4. Which of the following describes an element? *
2 points
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.
5. Which of the following is correctly matched? *
2 points
a. gold: element: silver: compound
b. oxygen: element: water: compound
c. sugar: element: salt: compound
d. water: element: hydrogen: compound​