Posted: April 26th, 2017
Potassium-40 decays into argon-40 with a half-life of 1.2 billion years. A particular mineral grain is known to have had a million potassium atoms in its crystal structure when it formed. When the
or this week’s assignment, please answer EACH of the following questions/prompts,and post them to the drop box as a single document.
- Name the three kinds of strength used to characterize materials AND give an example of a material that are strong in each of these modes.
- What kinds of bonding occurs in each of the three materials you listed in question #1?
- Explain how atoms can be arranged in such a way to create a permanent magnet.
- Identify 10 objects in your home that use semiconductors. What other kinds of materials with special electrical properties are found in all of these 10 objects?
- Research the status of magnetically levitated trains like the one now operating in China. How does it operate? How fast might it go?
- How does a nuclear reactor work?
- What types of researchers and scientists use carbon-14 radiometric dating? What type of researcher would use the other isotopes such as uranium-238?
- Use the periodic table to identify the element, its atomic number, mass number and electrical charge of the following:
-
- # Protons
|
- # Neutrons
|
- # Electrons
|
- Element Symbol
|
- Atomic Number
|
- Mass
|
- Electrical Charge
|
- 1
|
- 0
|
- 1
|
- 8
|
- 8
|
- 8
|
- 17
|
- 18
|
- 18
|
- 36
|
- 50
|
- 36
|
- Potassium-40 decays into argon-40 with a half-life of 1.2 billion years. A particular mineral grain is known to have had a million potassium atoms in its crystal structure when it formed. When the