1. A positively charged particle with a mass of 1 amu is called a ____________________. (neutron or proton)
2. The region in an atom that contains most of the mass is called the ____________________. (nucleus or electron cloud)
3. The number of protons in an atom determines its ____________________. (atomic number or mass number)
4. Elements in the same vertical column in the periodic table belong to the same ____________________. (group or period)
5. Elements in the same horizontal row in the periodic table belong to the same ____________________. (group or period)
6. The most reactive metals are ____________________. (alkali metals or alkaline-earth metals)
7. Elements that are unreactive are called ____________________. (noble gases or halogens)
8. Most metals are _____________________, meaning that they can be flattened with a hammer without shattering.
9. _____________________ have properties of both metals and nonmetals.
10. Charges flow easily in a(n) ____________________. (insulator or conductor)
11. ____________________ is the opposition to the flow of electric charge. (Resistance or Electric power)
12. A ____________________ is a complete, closed path through which charges flow. (load or circuit)
13. Lightning is a form of ____________________. (static electricity or electric discharge)
14. ____________________ is the rate at which charge passes a given point. (Current or Induction)
15. The buildup of electric charges on an object is called _________________________.
(electric discharge or static electricity)
16. The force between charged objects is an ____________________.
17. Charging by ____________________ occurs when charges in an uncharged object are rearranged without directly contacting a charged object.
18. All magnets have two ____________________ where the magnetic effects are strongest.
(poles or inductors)
19. Within an object are tiny magnetic ____________________ that can be either aligned or misaligned. (remains or domains)
20. ____________________ magnets retain their magnetic properties well but are difficult to magnetize. (Temporary or Permanent)
21. A(n) ____________________ converts kinetic energy into electrical energy. (electric motor or generator)
22. The interaction between electricity and magnetism is called ____________________. (electromagnetism or electromagnetic induction)
23. A ____________________ has two poles, exerts forces, and is surrounded by a magnetic field. (magnet or solenoid)
24. An ____________________ changes electrical energy into kinetic energy. (electric motor or electromagnet)
25. A(n) ____________________ is a coil of wire that produces a magnetic field when it is carrying an electric current. (solenoid or electric motor)
26. Like electric charges ____________________ each other.
27. The law of ____________________ of charge states that charges are not created or destroyed.
28. The attraction or repulsion between electric charges is called the ____________________.
29. If two wires of the same material have the same thickness but different lengths, the ____________________ wire will have a greater resistance.
30. Adding bulbs to a(an) ____________________ circuit causes all of the bulbs to shine less brightly.
31. In a(an) ____________________ circuit, different parts of the circuit are on separate branches.
32. The continuous flow of charges through a material is called electric ____________________.
33. Mendeleev discovered that periodic patterns appeared when he arranged the elements in order of increasing ____________________.
34. In the 1800s, Dmitri Mendeleev organized the first truly useful ____________________.
35. Each element is given a specific _________________________ that usually consists of one or two letters.
36. When placed near each other, unlike magnetic poles ____________________ each other.
37. A(an) ____________________ is the region of magnetic force around a magnet.
38. A magnet made from a material that easily loses its magnetism is called a(an) ____________________.
39. A(an) ____________________ is made from a material that keeps its magnetism for a long time.
40. A(an) ____________________ is any material that attracts iron and materials that contain iron.|||1) proton
2) nucleus
3)atomic nmber
4)peroid
5 group
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