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Chapter 2 – Structure of Atoms Multiple Questions and Answers.
| 6. | Elements naturally occurring. | ||
| A. | 92 | ||
| B. | 118 | ||
| C. | 93 | ||
| D. | 117 | ||
| 7. | 105 elements were discovered by the year _? | ||
| A. | 1984 | ||
| B. | 1974 | ||
| C. | 1086 | ||
| D. | 1996 | ||
| 8. | How many numbers of moles are equivalent to 8 grams of CO2? | ||
| A. | 0.15 | ||
| B. | 0.18 | ||
| C. | 0.21 | ||
| D. | 0.24 | ||
| 9. | A _ is a pure substance is made up of two or more elements. | ||
| A. | Mixture | ||
| B. | Elements | ||
| C. | Solution | ||
| D. | Compound | ||
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