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Atomic Charges

15. 16. Atomic Charges. Atomic Charges. 9/4/14. 9/4/14. S tarter. A pplication. P ractice. C onnection. E xit. Can you explain why the electrons don’t leave their orbits of the atom?. Agenda. 1. Starter 2.Atomic Charges Notes 3. Atomic Charges Activity 4 . Exit. Table of Contents.

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Atomic Charges

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  1. 15 16 Atomic Charges Atomic Charges 9/4/14 9/4/14 Starter Application Practice Connection Exit • Can you explain why the electrons don’t leave their orbits of the atom?

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

  3. Table of Contents Date Lecture/ Activity/ Lab Page 8/29 Syllabus /Notebook Guidelines 1-2 8/29 Periodic Table/ Formula 3-4 8/29 Tools/ Measurement 5-6 8/29 Lab Report/ Investigations 7-8 8/29 Restroom passes/Homework Log 9-10 9/2 Atomic Theory Research notes 11-12 9/3 Atomic Structure 13-14 9/4 Atomic Charges 15-16

  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. Application: Part A Part B Part C

  7. 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 .

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

  9. 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 .

  10. 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!

  11. 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.

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

  13. 15 16 Atomic Charges Atomic Charges 9/4/13 9/4/13 Starter Application Practice Connection Exit • Can you explain why the electrons don’t leave their orbits of the atom?

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