1 / 38

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

chas
Download Presentation

Homework from page 104

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related