Unit 3 The Atom & Light

1. Unit 3The Atom & Light

2. Today… • Turn in: • Goal Sheet – fill out & turn in • Our Plan: • New Calendar • Inquiry Part 1 (10 minutes) + Video • Start Part 2 • Wrap Up – Build sulfur online • Homework (Write in Planner): • Part 1 must be done by next class

4. Crash Course Video – The Atom • http://www.youtube.com/watch?v=FSyAehMdpyI

5. Work Time • Complete Part 1 individually and begin Part 2 as a team. Have Mrs. C check at each appropriate spot. Part 1 is due at the beginning of next class.

6. POGIL Jobs • Leader – In charge of the group, reads the questions, summarizes what should be written • Task Master – Makes sure the group is on task and keeps track of time • Quality Control – Makes sure that everyone has close to the same answers recorded • Motivator – encourages the group and makes sure that everyone is participating and that all ideas are heard

7. Wrap Up – Exit Ticket • Go to the website www.kscience.co.uk/animations/atom.htm and build a Sulfur atom. Show it to Mrs. C.

8. Today… • As you come in: • Get a notebooklet and worksheet packet • Our Plan: • TED Video • Review – Find Someone Who • Inquiry Part 2 & 3 • Wrap Up – Online Exit Ticket • Homework (Write in Planner): • Finish Inquiry Packet

10. …

14. TED Video Review • https://www.youtube.com/watch?v=yQP4UJhNn0I

15. Find Someone Who • Move around the classroom and find students who can answer the questions on p. 2 of your notebooklet. Be sure to get their signature or initials.

16. POGIL Jobs • Leader – In charge of the group, reads the questions, summarizes what should be written • Task Master – Makes sure the group is on task and keeps track of time • Quality Control – Makes sure that everyone has close to the same answers recorded • Motivator – encourages the group and makes sure that everyone is participating and that all ideas are heard

17. Wrap Up • Clicker Review • OR • http://www.learningliftoff.com/wp-content/uploads/2014/05/HS-Science-Mass-Practice-VHS_CHEM_S1_02_03_108_atomic_number_mass_practice.swf

18. Today… • Turn in: • Guided Inquiry Packet • Have your area clear except for WS Packet & something to write with • Our Plan: • Hog Hilton • Notes – orbitals & electron configurations • Online Orbital Activity • Electron Configurations • Worksheet #1 • Homework (Write in Planner): • Worksheet #1

19. Bohr • He said that electrons travel around the atom in defined orbits or energy levels • The energy levels are like rungs of a ladder

20. Bohr’s Model

21. Schrödinger • He developed the modern theory of the atom • Came up with mathematical equations to predict the locations of electrons • Quantum mechanical model – based on probability

22. Analogy – p.130 • Similar to the motion of a rotating propeller blade. • Cannot tell its precise location at any instant (The Heisenberg Uncertainty Principle) • The cloud is more dense where the probability of finding an electron is high

23. Atomic Orbitals • Electrons are found in energy sublevels (atomic orbitals) • The sublevel corresponds to an orbital of a different shape

24. Atomic Orbitals • Orbitals are located inside energy levels just like subdivisions are located inside cities.

25. Orbitals • Region of space in which there is a high probability of finding an electron

26. Sublevels

27. Label Your PT

29. Orbitals • Only 2 electrons can fit in each orbital. • That means that any s orbital can only hold 2 electrons, and any d orbital can only hold 2 electrons • Since there are 5 d orbitals, it can hold 10 electrons total

30. Electrons

31. Label Your PT

32. Quantum Number • Indicates the probable location of an electron in an atom • LIKE AN ADDRESS!

33. Principle Quantum Number • Symbol = n • Indicates – energy level • Possible Values – 1-7 • STATE

34. Orbital Quantum # • Indicates – sublevel (orbital shape) • Possible Values – s, p, d, f • CITY

35. Magnetic Quantum Number • Indicates – the orientation in space of an orbital of a given energy and shape (which room is it in) • STREET

37. Spin Quantum Number • Indicates – 2 possible spin states • Possible Values – Clockwise, Counterclockwise • HOUSE NUMBER

38. TED Video – uncertain location of electrons • https://www.youtube.com/watch?v=8ROHpZ0A70I

39. Break Time! • Do the front of WS#1 through problem 7.

40. Break Time • Get out your chromebook and go to http://www.learner.org/interactives/periodic/elementary_interactive.html • Complete all four elements listed and show Mrs. C when you are done.

41. Challenge • This is the electron configuration for potassium. What do you think each number and letter means? 1s22s22p63s23p64s1

42. The Blocks of the PT

43. The Blocks of the PT • Whichever block an element is in corresponds to the orbital that it’s valence electrons are located. • Valence electrons are the outermost electrons in an atom

45. Electron Configuration • Shows how many electrons an atom has in each of its sublevels.

46. Remember • s holds 2 electrons • p holds 6 electrons • d holds 10 electrons • f holds 14 electrons

47. Aufbau Principle • An electron occupies the lowest energy level that is available • Additional electrons keep “building up” to new levels

49. Hund’s Rule • Every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singlyoccupied orbitals have the same spin.

50. http://www.strw.leidenuniv.nl/~thi/lecture3/aufbau4.gif