Unit 1Part II: Atomic Structure

1. Unit 1Part II: Atomic Structure

2. Catalyst-Tuesday • What do you already know about “atoms”? Make a list of everything you have learned or think you have learned about them. • What charge do protons have? Neutrons? Electrons? (HINT: Look around the room!) • Approximately how many copper atoms are there in a penny? Take a guess! • Reflect on your quiz performance yesterday. How do you think you did? Why? • SATWOTD: exorbitant (adj) in regard to a price or amount charged, unreasonably high

3. Size of an Atom • How many copper atoms make up a penny? ANSWER: approximately 2.4 x 1022 atoms. Radii of most atoms: 5x10-11m to 2x10-10m

4. Objective • IWBAT describe general atomic structure of neutral atoms • IWBAT identify relevant information from periodic notation and nuclear notation elements

5. Agenda • Catalyst/Objective • SATQOTD • Quiz Return/Tracking • Atomic Scavenger Hunt • Introduction into atoms/elements • Periodic Table Practice • Exit Ticket

6. SATQOTD A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory. There are 100 seniors, 150 juniors, and 200 sophomores who applied. Each senior’s name is placed in the lottery 3 times; each junior’s name, 2 times; and each sophomore’s name, 1 time. What is the probability that a senior’s name will be chosen? • 1/8 • 2/9 • 2/7 • 3/8 • 1/2

7. Info on the SAT • Reading (200-800 points) • One 20-minute section • Two 25-minute sections • Math (200-800 points) • One 20-minute section • Two 25-minute sections • Writing (200-800 points) • One 10-minute section • Two 25-minute sections

8. Quiz Return • 1st Block Average: 82% • 3rd Block Average: 83% YOU MET THE BIG GOAL! Retesting reminders

9. ATOMIC STRUCTURE

10. Atomic Scavenger Hunt • Goals for the scavenger hunt: • Fill in the subatomic particle chart (shown above) • Jot down any other notes that you think are important

11. Expectations • You will move around the room in an orderly manner. • You do not have to wait for me to tell you to transition—you may move as you finish filling out the appropriate information • You may NOT run • I should NOT hear your voice over anyone else’s • You will have 7 minutes to complete this.

12. Subatomic Particles • Protons • Neutrons • Electrons

13. Protons, Neutrons, & Electrons

14. Periodic Notation Chemical Name Chemical Symbol

15. Periodic Notation • Elements are different because they contain different numbers of protons • Atomic number: number of protons in the nucleus of an atom of that element • Atomic Mass: Average mass of all isotopes on the planet.

16. Nuclear Notation Ne 20 Mass Number 10 Atomic number Chemical Symbol

17. The number of protons DEFINES THE ELEMENT The number of electrons and neutrons can change, but carbon will ALWAYS have 6 protons. If Carbon had 7 protons, what would it become? If it had 5 protons, what would it become?

18. PRACTICE! Atomic Mass • With your neighbor, take 5 min to complete the following chart in your notebooks.

19. Mass Number The Periodic Table does NOT tell us something called the MASS NUMBER. Remember, the atomic mass is the average of masses all together. MASS NUMBER = # Protons + # Neutrons  This will tell us the mass of the atom!! **In order to know this number, it must be given OR number of neutrons must be given!!* YOU CANNOT PULL THIS FROM THE PToE!

20. How do we calculate subatomic particles? Atomic number = # of protons = # of electrons (in a neutral atom) If MASS NUMBER = # Protons + # Neutrons, then how do we calculate # neutrons if only given Mass number and atomic number? # Neutrons = Mass Number – Atomic Number

21. 107 47 Ag

22. EXIT TICKET

23. Exit Ticket • The atomic number represents the number of _______________ • Neutrons and Protons are found in the _________ of the atom. • What is the nuclear notation of an atom with: atomic number: 8 mass number: 17

24. CatalystWednesday • What information can you gain about Gold (Au) just from looking at the PToE? • Fill in the following information: Element: Atomic Number: Mass Number: 40 Number of Protons: Number of Neutrons: Number of Electrons: 18 Nuclear Notation:

25. Agenda • Catalyst/Objective • Homework Review • Isotopes • Intro to Ions • Exit Ticket

26. Homework Check

27. Notes! Isotope • Isotopes: atoms that have the same number of protons but different number of neutrons. • Ex: carbon-12 and carbon-14 • The number next to the element represents the mass number.

28. Isotope Notation Carbon - 14 Mass # Element Name

29. Atomic Mass (what’s on the PToE and what we mentioned yesterday) • Atomic mass: weighted average mass of the atoms in a naturally occurring sample of the element. • Reflects both the mass and relative abundance of the isotopes as they naturally occur.

30. Practice

31. Discuss What is different about isotopes of the same element? • ______________ • ______________ • What is the same about isotopes of the same element? • ______________ • ______________

32. Review: Model of the atom so far • We know… • Protons and neutrons are in the _________ ? • Electrons are located __________ ? • What does this all look like?

33. Ions • Electrons • Where to they exist? • What charge do they have? • What is true about protons and electrons in a NEUTRAL (regular) atom?

34. Ions • ION = an atom with a positive or negative charge; atom with extra or fewer electrons Think about what charge electrons have. • Anion: a negative ion  Does this have MORE or LESS electrons??? • Cation: a positive ion  Does this have MORE or LESS electrons??? • Let’s draw this so we can see…

35. Picture of Fl- (pluses and minuses)

36. Why do ions have charges? • Ladies, please move to one side of the room. • Gentlemen, move to the other. • Girls, you are PROTONS • Gentlemen, you are ELECTRONS How many protons do we have? What element is this?

37. Substance: Chloride Symbol: Cl-1 Atomic Number: Mass Number: 35 Number of Protons: Number of Neutrons: 18 Number of Electrons:

38. Substance: Oxide ion Symbol: O2- Atomic Number: 8 Mass Number: 16 Number of Protons: Number of Neutrons: Number of Electrons:

39. Substance: Strontium ion Symbol: Sr2+ Atomic Number: Mass Number: 76 Number of Protons: 38 Number of Neutrons: Number of Electrons:

40. Discuss… • What is different about ions of the same element? • ______________ • ______________ • What is the same about ions of the same element? • ______________ • ______________

41. Atom, Isotope, Ion Worksheet Partner Practice • With your partner, complete the ion worksheet. You will have approximately 10 minutes. • Only talk about the task at hand. I will take points off your grade if you are not! • Once you have decided on an area to work, you may not get out of your seat unless you ask. • When you finish, raise your hand, and I will send you to the solution station to check your answers!

42. Exit Ticket

43. Exit Ticket • What charge does a cation have? • How many electrons does Cl- have?

44. Atom, Ion, Isotope Worksheet on DESK! Catalyst Thursday • Tell me everything you know about an atom with: • 13 protons, mass number 27, 10 electrons • What are 3 physical properties? • What are 3 chemical properties? • What is the density of a substance with a volume of 3mL and a mass of 27g?

45. Objective

46. Agenda (Thursday) • Catalyst/Objective • Agenda • Current Event • Pass-The-Atom • Quick Review/Venn Diagram • Review Activity

47. Current Event

48. Pass-The-Atom • You and a partner will work together to answer information about atoms that will be passed around to you. • You will have exactly 1 minute per atom to work on it, and then I will say “pass” and you will pass the atom to a different pair. You will do this until you’ve had all 17 atoms! • The number of the atom is written in red on the plate.

49. Quick Review • What is the atomic number (what does it mean)? • What is the mass number (what does it mean)? • How can you calculate mass number? • WHERE SHOULD YOU NEVER EVER TAKE MASS NUMBER FROM?? • What are the charges of protons, neutrons, and electrons?

50. NOTES Neutral atom ion isotope