1. Copper sulfate can be further subdivided into simpler substances by chemical means only. Therefore, it is _______.   a compound   a mixture   an element   Hint Half-n-half Clue   2. Copper sulfate solution can be further subdivided into simpler substances by physical (mechanical) means. Therefore, it is _______.   an element   a compound   a mixture   Half-n-half Clue   3. Which of the following is an element?   Calcium chloride   Calcium chloride solution   Calcium   Half-n-half Clue   4. H2O and FeS represent _______.   compounds   mixtures   elements   Half-n-half Clue   5. Which of the following is an impure substance made up of two or more types of atoms or elements?   Mixture   Element   Compound   Half-n-half Clue   6. Which of the following is a pure substance made up of two or more types of atoms or elements?   Compound   Mixture   Element   Half-n-half Clue   7. Which of the following is a pure substance made up of one type of atoms?   Mixture   Element   Compound   Half-n-half Clue