Online teaching with Kubbu

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Chemical elements Author: Description: Keywords: , , , , , , online teaching Content: Definitions: 0. C 1. Au 2. Pb 3. Na 4. Ag 5. Fe 6. Mg 7. Cl 8. F 9. Ca 10. He 11. Cu 12. Li 13. N 14. S 15. Se Answers: 0. helium 1. copper 2. chlorine 3. gold 4. magnesium 5. sodium 6. iron 7. carbon 8. selenium 9. calcium 10. nitrogen 11. sulfur 12. silver 13. lithium 14. fluorine 15. lead