Q of the Day

1. Q of the Day Day 5 11-18 • What are the three types of radiation? • Draw the nuclear symbol for bromine-80 with a negative one charge.

2. Objective / Essential Question Day 5 11-18 What does the inside of an atom look like and how do we know?

3. Unit # 3 Test Monday 11-21 Day 5 11-18-11

4. Ape MAn Atomic number = protons = electrons (neutral atom) Mass # = Atomic # + neutrons

5. Parts of Atoms, Isotopes, and Ions • Ions • ________ atoms that have gained or lost ________ • Examples • Iron loses 2 electrons • Chlorine gains 1 electron Charged electrons Fe +2 Cl -1

6. Parts of Atoms, Isotopes, and Ions Fundamental parts of atoms shells electron - 1 0.00055 nucleus proton + 1 1.0 nucleus 0 1.00055 neutron

7. Parts of Atoms, Isotopes, + Ions • Individual _____ of any element • Represented with a _______ symbol atom nuclear A C X • X = _______ _______ • A = ____ _______ • Z = ______ _______ element symbol mass number Z atomic number

8. Parts of Atoms, Isotopes, and Ions • X = _______ _______ • A = ____ _______ • Z = ______ _______ • = ______ _______ • C = ______ __ __ ___ • # neutrons = ___ - ___ • # electrons = ___ - ___ element symbol A C X mass number Z atomic number protons number charge as an ion Z A Z C

9. Parts of Atoms, Isotopes, and Ions Mass number? Atomic number? # of neutrons? Element? Charge? # of electrons? 19 1- X 9

10. Particles of Radioacty. + Nuc. Rxns. • Nuclear Reactions • What forces act in the atom? • ______ _______ force holds _______ together • _____ _______ force causes ___________ • Natural radioactivity, radioactive decay, or nuclear disintegration is the ___________ … Strong nuclear protons Weak nuclear radioactivity spontaneous

11. Particles of Radioacty. + Nuc. Rxns. • Nuclear Reactions • Natural radioactivity, radioactive decay, or nuclear disintegration is the ___________ … ________ of ________ from an element due to instability of the _______. spontaneous emission radiation nucleus

12. Particles of Radioacty. + Nuc. Rxns. • Nuclear Reactions • Problems in nuclear stability occur when there are too few or too many ________. • All elements with an atomic number greater than ___ are radioactive. neutrons 83

13. Half Sheets Day 5 11-18-11

14. Review Day 5 11-18-11

15. Quick Talk Isotope Beta Atomic number Energy level Empty space Gold Foil Experiment Atom Mass number Alpha Ion Electron cloud Quark

16. Quick Talk Nuclear Force Proton Chadwick Nucleon Plum pudding model Law of Definite Proportions Positron Planetary model Cathode Ray Neutron J.J. Thomson Marie Curie

17. Q of the Day • Fill in the missing nuclear symbol and answer the following questions. • - what type of radiation is being produced in this reaction? • - what type of charge does this radiation particle carry? • - How does this type of radiation compare to the other two major types? 11-24 239 239 U  Np + _____ 93 92

18. Q of the Day • Explain how beta radiation (which is high speed electrons) can be emitted from the nucleus (electrons aren’t in the nucleus?)? • 2. What alpha-emitting element is used to produce actinium-227?

19. Notebooks • Timelines • Test • M.P. Grades

20. Model Jigsaw • Explain the parts of the model and specifically what each part represents. • Explain how or why the model was developed. • Explain what it represents well (its strengths as a model). • Explain some of its limitations (its weaknesses).

21. Model Jigsaw • Explain the parts of the model and specifically what each part represents. • Explain how or why the model was developed. • Explain what it represents well (its strengths as a model). • Explain some of its limitations (its weaknesses).

22. Model Jigsaw • Explain the parts of the model and specifically what each part represents. • Explain how or why the model was developed. • Explain what it represents well (its strengths as a model). • Explain some of its limitations (its weaknesses).

23. Q U I C K T A L K • Thomson • Atom • Proton • Electron cloud • Law of Definite Proportions • Bohr • Dalton • Plum Pudding model • Neutron • Alchemists • Mendeleev

24. We have Atoms! - 1850’s Cathode Ray Tubes Important?

25. Parts of Atoms, Isotopes, and Ions Mass number? Atomic number? # of neutrons? Element? Charge? # of electrons? 42 2+ X 20

26. Q of the day 11-16 • Thomson’s model of the atom was the first to show _________. • One thing that Thomson’s model showed incorrectly or not at all?

27. Q of the Day 11-19 • Rutherford and Soddy showed that radioactivity produces new ________________. • What information can you obtain from a nuclear symbol? What is the last thing you have in your notes?

28. Q of the Day 11-20 • Draw a nuclear symbol for an element with 17 protons, 18 neutrons, and 18 electrons • What element is it? • What is the atomic #? • What is the mass #? • What is the charge?

29. Particles of Radioacty. + Nuc. Rxns. Particles of Radioactivity  low: stopped by paper helium nucleus +2 4He 2  medium: stopped by clothes - 1 electron 0e - 1 high: stopped by thick lead and concrete  light energy 0

30. Particles of Radioacty. + Nuc. Rxns. Particles of Radioactivity short-lived 0e positive beta + 1 + 1 1H + 1 hydrogen nucleus 1 1n 0 0

31. Particles of Radioacty. + Nuc. Rxns. • Nuclear Reactions • The beta () particle has a ________ charge. How can it be released from the nucleus? The electron flies away as beta radiation! The proton stays in the nucleus! negative A neutron splits into a proton and an elec.! 1n → 1p+ + 0e – - 1 0 1