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Electrons Which one has a positive charge, a negative charge, and no charge. The charge on the proton cash advance loans electron are exactly the same size but opposite. The same number of cash advance loans and electrons exactly cancel one another in a neutral atom. Show animations and explain that protons and electrons have opposite charges and attract each other. Project the animation Hydrogen Atom. Give each student an activity sheet. Explore Do an activity to show that electrons and protons attract each other.
Question to investigate What makes objects attract or repel each other. Quickly pull your top hand up so that cash advance loans 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. Expected results The plastic will be attracted to your hand and move toward it. Explain Show students models comparing the number of protons and electrons in the plastic and skin before and after rubbing payday loans no credit check them together.
Explore Have students investigate what happens when a rubbed plastic strip is held near a desk or chair. Procedure, part 2 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. Expected results The plastic moves toward the desk. Have students charge two pieces of plastic and hold them near each other to see if electrons repel one other. Ask students to make a prediction: What do you think will happen if you charge two strips of plastic and bring them near each other. Procedure, part 3 2 pieces of charged plastic Charge two strips of plastic Slowly bring the two strips of plastic near each other.
Expected results The strips will move away or repel each other. Ask students: What happened when you brought the two pieces of plastic near each other. The ends of the strips moved away from each other. Use what you know about electrons and charges to explain why this happens. Each strip has extra electrons so they are both negatively charged.
Because like charges repel, the pieces of plastic repelled each other. Explore Have students apply their understanding of protons and electrons to explain what happens when a charged balloon is brought near pieces of paper. Materials for each group Inflated balloon Small pieces of paper, confetti-size Procedure Rub a balloon on your hair or clothes. Bring the balloon slowly toward small pieces of paper. Expected results The pieces of paper will jump up and stick on the balloon.
Ask students: What did you observe when the charged balloon was held near the pieces of paper. The paper pieces moved up and stuck on the balloon. Use what you know about electrons, protons, and charges to explain why this happens. When you rub the balloon on your hair or clothes it picks up extra electrons, giving the balloon a negative charge.
When you bring the balloon near the paper, the electrons from the balloon repel the electrons in the paper. Since more protons are at the surface of the paper, it has a positive change. The electrons are still on the paper, just not at the surface, so overall the paper is neutral.
Opposites attract, so the paper moves up toward the balloon. Extra Extend Demonstrate how electrons payday loans no credit check can attract a stream of water. Materials for the demonstration Sink Balloon Procedure Rub a balloon on your shirt or pants to give it a static charge. Turn on the faucet so that there is a very thin stream of water.
Slowly bring the charged part of the balloon close to the stream of water. Expected results The stream of water should bend as it is attracted to the balloon. Ask students: What did you observe when the charged balloon was held near the stream of water. The stream of water bent toward the balloon. When you bring the balloon near the stream of water, the electrons from the balloon repel the electrons in the water.
Since more protons are at the surface of the water, it has a positive change. Opposites attract, so the water moves toward the balloon. Standards NGSS Lesson 4. The mobilities of proton carriers in the glasses were studied in terms of the polymerization degree of the phosphate framework.
We found that the highly polymerized phosphate framework decreased the mobility of proton carriers, not because of suppression of the proton dissociation from oxygen atoms but rather the suppression of the proton migration. The article was received on 02 Aug 2017, accepted on 23 Oct 2017 and first published on 23 Oct 2017 If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using RightsLink.
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