1. What alkali metals are protected from air, water and other substances?
ANSWER: because alkali metals are the most reactive
2. What is the third most conductive material?
ANSWER: Gold
3. What is the least conductive material
ANSWER: nichrome
4. What is the other name of a negative electron?
ANSWER: Negatron
5. What is the decay wherein protons and neutrons are decreased by 2 and may result in a stable nucleus?
ANSWER: Alpha Decay
6. What physical property of a material that refers to the temperature at which ferromagnetic materials can no longer be magnetized by outside forces
ANSWER: Curie point
7. What is the Curie temperature of iron?
ANSWER: 770 degrees Celsius
8. Lodestone is a natural magnet.
9. It is the material used in making permanent magnet
ANSWER: hardened steel
10. What is the inferred absolute zero temperature of annealed copper?
ANSWER: -234.5 degrees Celsius
11. Which material that has a permeability slightly greater than 1?
ANSWER: Aluminum
12. What is the conductivity of a 99.5% pure aluminum?
ANSWER: 63%
13. What is the conductivity of a pure annealed copper wire?
ANSWER: 102.1%
14. What is the conductivity of a 99.9% pure gold?
ANSWER: 72.6%
15. What is the conductivity of a pure annealed silver wire?
ANSWER: 108.8%
16. What is a reference sheet for element that can be used to form engineering materials?
ANSWER: Periodic Table
17. What group of metals that are very soft metals?
ANSWER: Alkali metals
18. All elements in the center gap are __________.
ANSWER: metals
19. How many elements are found in Period 1 of the Periodic Table?
ANSWER: 2
20. How many elements are found in Period 2 of the Periodic Table?
ANSWER: 8
21. How many elements are found in Period 3 of the Periodic Table?
ANSWER: 8
22. How many elements are found in Period 4 of the Periodic Table?
ANSWER: 18
23. How many elements are found in Period 5 of the Periodic Table?
ANSWER: 18
24. The elements found in the center of the periodic table of elements are called __________.
ANSWER: Transition metals
25. The elements/ groups found in the Left and Right of the periodic table of elements is called __________.
ANSWER: Main Groups
26. What is the group of elements found in Period 6 of the Periodic Table of elements and is between Lanthanum and Lutetium?
ANSWER: Lanthanides
27. Why noble gases are called inert gases?
ANSWER: Because they are substances that are not chemically reactive
28. Most actinides are radioactive. They are also found in the Period 7 of the Periodic Table of Elements.
29. Halogens react with Groups 1A and 2A.
30. Halogens fall under what group in the periodic table?
ANSWER: Group 7A/7B
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