Magic of Electrons Lesson 1 Crossword

4. The center portion of an atom containing the protons and neutrons.
6. a device for reversing the direction of an electric current so that the alternating currents made in a dynamo are changed to direct current.
7. The number of electrons in the outer shell of an atom.
8. Negatively charged particles.
9. The smallest piece of an element that contains all properties of that element.
12. A device that converts mechanical energy into electricity.
13. The simplest form of matter.
16. The continuous flow through a component or an entire circuit.
19. Any of a class of devices that convert chemical energy directly into electrical energy.
20. Positively charged atomic particles.
21. Uncharged atomic particles.
22. An instrument for measuring the properties of an electrical circuit.
24. A device used to convert electric energy into mechanical energy.
26. The movement of electrons through a conductor.
27. The opposition to the flow of current.
31. Magnets can be made by passing a current through a coil of wire.

1. Electron flow is difficult between atoms.
2. An object or type of material that allows the flow of charge (electric current) in one or more directions.
3. The electrode from which a conventional current leaves a polarized electrical device such as a lead-acid battery.
5. The electrical charge an object develops as a result of having an unequal number of protons and electrons..
10. An object that is surrounded by a magnetic field and has the property of attracting iron or steel.
11. Neither a good insulator, nor a good conductor, but can be made a better conductor through doping.
14. A light emitting diode.
15. The number of protons present in the nucleus of an atom.
17. The electrons flow in the same direction all the time, from negative to positive.
18. The standard unit of electric charge in the International System of Units (SI).
23. A group of atoms bonded together.
25. The rotating coil or coils of a dynamo or electric motor.
26. A circuit is a complete circular path that electricity flows through.
28. The unit of electric current in the International System of Units (SI).
29. The difference in electric potential between two points.
30. An electrode of a polarized electrical device through which conventional current enters the device.