1. The constituents of a mixture do not retain their original properties.   True   False   2. Which of the following is the smallest part of a compound, whose properties are the same as those of the compound?   Mixture   Molecule   Atom   Element   Hint Half-n-half Clue   3. H2O and FeS represent _______.   mixtures   compounds   elements   Half-n-half Clue   4. Which of the following is a compound?   Sodium sulfide   Sodium   Sodium sulfide solution   Half-n-half Clue   5. Which of the following is a pure substance made up of one type of atoms?   Element   Compound   Mixture   Half-n-half Clue   6. Oxygen cannot be further subdivided into simpler substances by any physical or chemical means. Therefore, it is _______.   a compound   an element   a mixture   Half-n-half Clue   7. Copper sulfate can be further subdivided into simpler substances by chemical means only. Therefore, it is _______.   a mixture   a compound   an element   Half-n-half Clue