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Atomic Charges

23. 24. Atomic Charges. Atomic Charges. 9/9/13. 9/9/13. S tarter. A pplication. P ractice. C onnection. E xit. Agenda . 1. Starter 2.Atomic Charges Notes 3. Atomic Charges Activity 4 . Exit. Table of Contents. Date Lecture/ Activity/ Lab Page

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Atomic Charges

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  1. 23 24 Atomic Charges Atomic Charges 9/9/13 9/9/13 Starter Application Practice Connection Exit

  2. Agenda • 1. Starter • 2.Atomic Charges Notes • 3. Atomic Charges Activity • 4. Exit

  3. Table of Contents Date Lecture/ Activity/ Lab Page 8/28 Syllabus /Notebook Guidelines 1-2 8/28 Periodic Table/ Formula 3-4 8/28 Tools/ Measurement 5-6 8/28 Lab Report/ Investigations 7-8 8/28 Restroom passes/Homework Log 9-10 8/29 Safety equipment 11-12 8/30 Atoms Vocabulary 13-14 9/3 Atomic Theory Research notes 15-16 9/4 Observation Activity 17-18 9/5 Model Activity 19-20 9/6 Atoms Notes 21-22 9/9 Atomic Charges 23-24

  4. Starter Proton Electron Neutron

  5. Practice: • Always equal to Electrons in a neutral Atom • Found in nucleus • Positive Charge Used to hold protons in the nucleus • Found in nucleus Neutral (no charge) • Found in Electron cloud outside the nucleus • Always equal to protons in a neutral atom Negative charge

  6. 23 24 Atomic Charges Atomic Charges 9/9/13 9/9/13 Starter Application Practice Connection Exit

  7. Application: Part A Part B Part C

  8. Part A Procedure:Charged Plastic and Charged Skin • Cut two strips of grocery bag; about 2-4 cm wide and about 20 cm long • Hold the plastic strip firmly at one end. Then grasp the plastic strip between the thumb and fingers of your other hand • Quickly pull your top hand up so that the plastic strip runs through your fingers. Do this three or four times. • Allow the strip to hang down. Then bring your other hand near it. • Write “attract” or “repel” in the chart in your notebook • Describe what happened in the chart in your notebook .

  9. What is happening? Protons and Electrons before Rubbing Protons and ElectronsAfter Rubbing Opposites Attract!

  10. Part B Procedure:Charged Plastic and Neutral Desk • Charge one strip of plastic the same way you did previously. • This time, bring the plastic strip toward your desk or chair. • Write “attract” or “repel” in your chart • Describe what happened in the chart in your notebook .

  11. Part C Procedure:Charged Plastic and Charged Plastic • Charge two strips of plastic • Slowly bring the two strips of plastic near each other. • Write “attract” or “repel” in your chart. • Describe what happened in the chart in your notebook . Two Neutral Plastic Strips Two Charged Strips Like Charges Repel!

  12. 23 24 Atomic Charges Atomic Charges 9/9/13 9/9/13 Starter Application Practice Connection Exit

  13. Connection: • Inflate a balloon • Now rub it on your hair and clothing! • Bring the balloon slowly towards the confetti paper • Draw the following pictures in your journal • describe what is happening in each.

  14. 23 24 Atomic Charges Atomic Charges 9/9/13 9/9/13 Starter Application Practice Connection Exit • Can you explain why the electrons don’t leave their orbits of the atom?

  15. Exit: • Can you explain why the electrons don’t leave their orbits of the atom?

  16. 23 24 Atomic Charges Atomic Charges 9/9/13 9/9/13 Starter Application Practice Connection Exit • Can you explain why the electrons don’t leave their orbits of the atom?

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