Chemical Elements 2
| __ | 1. | Boron | | A. | B | | __ | 2. | Calcium | | B. | Ne | | __ | 3. | Carbon | | C. | S | | __ | 4. | Hydrogen | | D. | U | | __ | 5. | Kryton | | E. | Kr | | __ | 6. | Mercury | | F. | Hg | | __ | 7. | Neon | | G. | C | | __ | 8. | Nitrogen | | H. | N | | __ | 9. | Sulfur | | I. | H | | __ | 10. | Uranium | | J. | Ca |
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