What is the valence of the first 40 elements?
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1. HYDROGEN=1
2. HELIUM=0
3. LITHIUM=1
4. BERYLLIUM=2
5. BORON=3
6. CARBON=4
7. NITROGEN=3
8. OXYGEN=2
9. FLUORINE=1
10. NEON=0
11. SODIUM=1
12. MAGNESIUM=2
13. ALUMINUM=3
14. SILICON=4
15. PHOSPHORUS=5
16. SULFUR=6
17. CHLORINE=5
18. ARGON=0
19. POTASSIUM=1
20. CALCIUM=2
21. SCANDIUM=3
22. TITANIUM=4
23. VANADIUM=5
24. CHROMIUM=6
25. MANGANESE=4
26. IRON=4
27. COBALT=4
28. NICKEL=4
29. COPPER=2
30. ZINC=2
31. GALIUM=3
32. GERMANIUM=4
33. ARSENIC=5
34. SELENIUM=6
35. BROMINE=5
36. KRYPTON=2
37. RUBIDIUM=1
38. STRONTIUM=2
39. YTTRIUM=3
40. ZIRCONIUM=4
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