Chapter 3 Questions

Chapter 3
Preamble: This chapter is all about tiny particles. Particles that are so tiny it takes 1 million million of them just to be able to see them with the naked eye. At that scale, it's really easy to forget that these are real things, and instead think of them as the pictures you find in text books. In case it will help you to visualize what you'll be studying, I've included an actual photo of a sharp needle using a special kind of microscope, in which you can see the actual atoms!
Haz clic aqui

Just a small additional note: please express all of your answers to the correct number of significant digits.
Thanks!

1. Read Chapter 3.

2. (60) Complete the following questions:
3, 5, 7, 11, 13, 17, 25, 31, 39, 43, 45, 47, 49, 51, 55.
4, 4, 4, 4, 4, 4, 4, 4 4, 4, 4, 4, 4, 4, 4.

3. (3) Using the conversion factors you learned about in Chapter 2, calculate how many kilometers across the nucleus of an atom would be if the whole atom was the diameter of the earth. Show the conversion factors in your answer. Express your answer in scientific notation. Use the info in 3.1 "Size Relationships within an Atom" to help you.

4. (4) What type of subatomic particle make up protons and neutrons? What are the six flavours of this particle?

5. (3) Find a use for protium, deuterium and tritium (other than those uses listed in the text).

6. (4) Why does the average atomic number need to be a weighted average? Explain in detail how a weighted average works (Hint: a good way to tackle this problem would be to discuss why each step of the calculation is performed, and then discuss the overall result).

7. (4) Calculate the weighted average of magnesium using the information found in the chapter. Show all of your calculations.

9. (4) What metals are found in the body? In what vitamin is the metal cobalt found? Have you ingested any cobalt today?

10. (2) With regards to the various subshells, what does the "s", "p", "d" and "f" stand for?

11. (4) Each electron in an atom can be identified by a set of 4 pieces of information, similar to our postal address system: country, city, street, building number. What are these four pieces of information in order of least specific to most specific?

12. (1) How many electrons are in each orbital? Subshell? Shell?

13. (3) In an atom where the 4th shell is completely filled, how many subshells are filled? How many orbitals? How many electrons are there?

14. (3) Approximately, how many electrons do you have in your body? Include calculations and conversion factors in your answer.

60 marks for chapter questions
35 marks for assignment questions
95 marks in total

Bonus: (3) Watch the following video:
What are the properties of alkali metals as shown in this video? Why do they react in this fashion? What do you notice about the intensity of the reaction and the positioning of the various alkali metals in the periodic table? Please explain all of your answers fully.