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
Very good and helpful questions and answers regarding academics! i really needed this post because i'm preparing for an exam where this will be helpful. thanks alot.
ReplyDeleteThe questions in this blog is very helpful for the students of chemistry even am going to share this with my sister she realy get some help from this.
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