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Homework from page 104

Homework from page 104. Homework from page 104. Boron has two isotopes. boron-10 mass = 10.013 amu abundance = 19.8% Boron-11 mass = 11.009 amu abundance = 80.2% Calculate its atomic mass. Homework from page 104. (mass x abundance) + (mass x abundance) boron-10

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Homework from page 104

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  1. Homework from page 104

  2. Homework from page 104 • Boron has two isotopes. boron-10 mass = 10.013 amu abundance = 19.8% Boron-11 mass = 11.009 amu abundance = 80.2% Calculate its atomic mass.

  3. Homework from page 104 (mass x abundance) + (mass x abundance) boron-10 mass = 10.013 amu abundance = 19.8% Boron-11 mass = 11.009 amu abundance = 80.2%

  4. Homework from page 104 (mass x abundance) + (mass x abundance) boron-10 mass = 10.013 amu abundance = 19.8% Boron-11 mass = 11.009 amu abundance = 80.2%

  5. Homework from page 104 (mass x abundance) + (mass x abundance) 10.013 amu x 19.8% 11.009 amu x 80.2%

  6. Homework from page 104 (mass x abundance) + (mass x abundance) 10.013 amu x .198 11.009 amu x .802

  7. Homework from page 104 (mass x abundance) + (mass x abundance) 10.013 amu x .198 1.983 11.009 amu x .802 8.929

  8. Homework from page 104 (mass x abundance) + (mass x abundance) 10.013 amu x .198 1.983 11.009 amu x .802 8.829

  9. Homework from page 104 (mass x abundance) + (mass x abundance) 1.983 + 8.829

  10. Homework from page 104 (mass x abundance) + (mass x abundance) 1.983 + 8.829 10.812 amu

  11. Homework from page 104 (mass x abundance) + (mass x abundance) 1.983 + 8.829 10.812 amu

  12. Homework from page 104 • Helium has two naturally occurring isotopes, helium-3 and helium-4. The atomic mass of helium is 4.003 amu. Which isotope is more abundant in nature?

  13. Homework from page 104 • Helium has two naturally occurring isotopes, helium-3 and helium-4. The atomic mass of helium is 4.003 amu. Which isotope is more abundant in nature?

  14. Homework from page 104 • Calculate the atomic mass of magnesium. Three isotopes are: mass = 23.985 amu, abund. = 78.99% mass = 24.986 amu, abund. = 10.00% mass = 25.982 amu, abund. = 11.01%

  15. Homework from page 104 (mass x abundance) mass = 23.985 amu, abund. = 78.99% mass = 24.986 amu, abund. = 10.00% mass = 25.982 amu, abund. = 11.01%

  16. Homework from page 104 (mass x abundance) 23.985 x 78.99% 24.986 x 10.00% 25.982 x 11.01%

  17. Homework from page 104 (mass x abundance) 23.985x.7899 24.986 x.1000 25.982 x .1101

  18. Homework from page 104 (mass x abundance) 23.985x.7899 = 18.95 amu 24.986 x.1000 = 2.498 amu 25.982 x .1101 = 2.861 amu

  19. Homework from page 104 (mass x abundance) 18.95 amu 2.498 amu + 2.861 amu

  20. Homework from page 104 (mass x abundance) 18.95 amu 2.498 amu + 2.861 amu 24.31 amu

  21. Homework from page 104 (mass x abundance) 18.95 amu 2.498 amu + 2.861 amu 24.31 amu

  22. Homework from page 104 21. Nitrogen has two naturally occurring isotopes, N-14 and N-15. The atomic mass of nitrogen is 14.007 amu. Which isotope is more abundant in nature?

  23. Homework from page 104 21. Nitrogen has two naturally occurring isotopes, N-14 and N-15. The atomic mass of nitrogen is 14.007 amu. Which isotope is more abundant in nature?

  24. Daily Quiz

  25. Daily Quiz 1. What element has 47 protons? • iron (Fe) • silver (Ag) • titanium (Ti) • platinum (Pt) • uranium (U)

  26. Daily Quiz 2. What element has 12 electrons? • magnesium (Mg) • beryllium (Be) • chromium (Cr) • phosphorus (P) • carbon (C)

  27. Daily Quiz 3. How many neutrons are in helium? • 1 • 2 • 3 • 4 • 5

  28. Daily Quiz 4. How many protons are in sodium? • 1 • 3 • 11 • 12 • 23

  29. Daily Quiz 4. How many electrons are in neon? • 1 • 8 • 10 • 18 • 20

  30. Daily Quiz 5. How many neutrons are in carbon? • 2 • 4 • 6 • 8 • 12

  31. Daily Quiz 1. What element has 47 protons? • iron (Fe) • silver (Ag) • titanium (Ti) • platinum (Pt) • uranium (U)

  32. Daily Quiz 1. What element has 47 protons? • iron (Fe) • silver (Ag) • titanium (Ti) • platinum (Pt) • uranium (U)

  33. Daily Quiz 2. What element has 12 electrons? • magnesium (Mg) • beryllium (Be) • chromium (Cr) • phosphorus (P) • carbon (C)

  34. Daily Quiz 2. What element has 12 electrons? • magnesium (Mg) • beryllium (Be) • chromium (Cr) • phosphorus (P) • carbon (C)

  35. Daily Quiz 3. How many neutrons are in helium? • 1 • 2 • 3 • 4 • 5

  36. Daily Quiz 4. How many protons are in sodium? • 1 • 3 • 11 • 12 • 23

  37. Daily Quiz 4. How many electrons are in neon? • 1 • 8 • 10 • 18 • 20

  38. Daily Quiz 5. How many neutrons are in carbon? • 2 • 4 • 6 • 8 • 12

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