ASSIGNMENT IN CHEMISTRY

Assignment in Chemistry for 3-Campion, 3-Gonzaga and 3-Pignatelli

TOPIC: Radioactivity and Nuclear Stability

Click on the links below.

http://www.orcbs.msu.edu/radiation/resources_links/historical_figures/historical_figures.htm


Answer the following questions.
Type your answers and print it in a clean short bond paper. I will not accept handwritten assignment.
Answers only.
Submit this assignment on Sept.15, 2009, before 7:30 AM
You may also search other internet websites for the answers to the given questions.

QUESTIONS:
Click this link to answer the following questions:
http://www.accessexcellence.org/AE/AEC/CC/historical_background.php

1. Who discovered x-rays in 1895?
2. What part of the body was pictured using x-rays?
3. Study the picture carefully and make a hypothesis as to what the person was wearing on one of their fingers.
4. Name the scientist who initially thought that the sun’s energy was being absorbed by a uranium sample which then emitted x-rays.
5. Briefly describe the circumstances that lead the scientist in question #4 to change his hypothesis about the sun’s energy and the uranium sample.
6. Refer to #5 : What had been discovered?
7. How was the natural radiation different from x-rays?
8. Who coined the word “radioactivity”?
9. What are the elements did the scientist in #8 discover?
10. Who is known as the father of nuclear physics?
11. Elements such as uranium, thorium and plutonium undergo a change in the nucleus by emitting radiation which changes the original (parent) element into another element known as ___(a)___ element. This radioactive ___(b)___ process continues until the element produced is no longer radioactive.
12. What are the three types of nuclear radiation? Describe each type.
13. What is meant by “half-life”?
14. What is the term applied to the process of changing one element into another element through nuclear decay?
15. What do you call the process of splitting an atom’s nucleus into two nuclei with smaller masses?
16. What is the atomic bullet that causes the U-235 nucleus to split into two?
17. Explain nuclear chain reaction?
18. Who achieved the first man-made self-sustaining nuclear chain reaction?
19. What are the great scientific implications of his discovery?

Click on this link:
www.wikipedia.org/wiki/Manhattan_Project
20. Why was the Manhattan Project developed?
21. What are the fuels used in the bombs dropped in Nagasaki and Hiroshima during WW II?
22. What are the ways that inanimate object were damaged or destroyed in both Nagasaki and Hiroshima blasts?
23. What were the causes of human casualties in Hiroshima and Nagasaki?
24. What is ‘flash burn’?
25. What is meant by ‘ground zero’? What is it like there?
26. Describe what happened in the outlying areas of Hiroshima?
27. How much harmful radiation existed in Hiroshima and Nagasaki after the explosion?

You may also try these links:
www.yale.edu/lawweb/Avalon/abomb/mp03.htmlwww.yale.edu/lawweb/Avalon/abomb/mp04.html