Lesson 2-ionization
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Ionization is the process by which an atom acquires a positive or negative charge, forming ions like cations for positive ions and anions for negative ions. Silver is the best conductor of electricity because it has many free electrons that allow electron flow, while copper is the second best and is commonly used for electrical wires; insulators have few free electrons and do not conduct electricity well.
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2) Semiconductors have energy bands where electrons can move between a valence band and conduction band. The energy gap between the bands determines conductivity.
3) Intrinsic semiconductors have equal electrons and holes. Extrinsic semiconductors are doped with impurities to increase conductivity, creating either n-type or p-type materials. N-type adds extra electrons and p-type adds holes.
Electricity 2
Electricity and magnetism are explained through three main topics: static electricity, electric currents and circuits, and electromagnetism. Key points include: (1) static electricity is the buildup of electric charge on an object that does not flow, (2) current is the flow of electrons through a conductor such as a wire in a circuit, and (3) electromagnets and motors/generators involve the interaction between electric currents and magnetic fields to produce magnetic effects or convert between electrical and mechanical energy.
1-Electricity-Magnetism-Notes.pdf
This document provides an overview of lessons on electricity and magnetism:
Static electricity results from the buildup of electrical charges on objects. Electricity involves the movement of electrons through circuits. Circuits require a complete path between an energy source and load. Electromagnets are created when current passes through a solenoid wrapped around an iron core, producing a magnetic field. The document reviews key concepts like conductors, insulators, resistance, and electromagnetic induction.
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Lesson 2-ionization
- 2. Ionization- process by which an atom acquires a negative or positive charge.
- 6. Free Electrons In order for the electrons to flow, they have to break free from their atom
- 7. Conductor - material having many free electrons so they allow the flow of electrons.
- 8. Silver-best conductor of electricity because it has the lowest resistance of all metals.
- 9. Copper- material used as electrical wires, second best conductor
- 10. Insulator- materials having few free electrons so they do not allow the flow of electricity.
- 12. 2. Materials that do not allow the flow of electricity
- 13. 3. Process by which an atom acquires or gain a charge.
- 14. 4. Positive ion 5. Negative ion
- 15. 6. Second best conductor and used as electrical wires.
- 16. 7. Materials that allow the flow of electricity.