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What is the atomic number for Carbon?

Module Two Assignment

Name:

Elements

Instructions: Using the periodic table, answer the following questions about elements.

1. What is the atomic number for Carbon?

2. What is the chemical symbol for Tungsten?

3. What is the atomic number for strontium?

4. What is the atomic number for mercury?

5. What element has the symbol Ag?

6. What element has the symbol Nb?

7. What is the atomic number for gallium?

Atoms and Ions

Instructions: Answer the following questions regarding ions losing and gaining electrons.

1. How many electrons does potassium need to lose to become an ion? Will it become a positively charged cation or a negatively charged anion?

2. How many electrons must nitrogen gain to become like its closest noble gas, Neon?

3. What are valence electrons?

Instructions: Answer the following questions about isotopes.

4. Given that the mass number for carbon is 13, how many protons and how many neutrons does the isotope contain?

5. Hydrogen has two naturally occurring isotopes: hydrogen-1 and hydrogen-2. What is the symbol for each of these hydrogen isotopes?

6. How many neutrons are contained in nitrogen-15?

7. How many protons does calcium-43 contain?

Atomic Mass

Instructions:

1. Find the atomic mass unit of Sulfur-32 with a mass of 31.972 and percent abundance 94.99%, Sulfur-33 with a mass of 32.971 and percent abundance 0.75%, Sulfur-34 with a mass of 33.968 and percent abundance 4.25%, and Sulfur-36 with a mass of 35.967 and percent abundance 0.01%.

2. Find the atomic mass unit of Silicon-28, Silicon-29, Silicon-30 with masses of 27.977, 28.976, 29.974, respectively. The percent abundance of the silicon isotopes is 92.2%, 4.7% and 3.1%, respectively.

Periodic Table and Its Trends

Instructions: Answer the following questions regarding the periodic table, the Bohr Model, and electron configuration.

1. Explain periodic table.

2. What is the Bohr Model? Provide a summary in your own words.

3. What is the electron configuration of calcium?

4. What is the electron configuration of oxygen?

5. How many valence electrons does magnesium (Mg) have?

Molecules and Compounds

Instructions: Find the mass ratios and atomic ratios of the following compounds.

1. PCI3

2. SbF5

3. BaCl2

4. BaI2

5. CCl4

6. OsO4

Instructions: Write the formula for each of the following ionic compounds.

7. Sodium chloride

8. Potassium chloride

9. Ammonium chloride

10. Sodium hydroxide

11. Calcium Nitrate

Instructions: Name the following ionic compounds.

12. MgCl2

13. CaCl2

14. CuSO4

15. Al2O3

Instructions: Name the following molecular compounds.

16. PCI3

17. PCI5

18. CCI4

19. NI3

Instructions: Write the formulas for the following molecular compounds.

20. Sulfur hexafluoride

21. Sulfur dioxide

22. Dinitrogen trioxide

23. Carbon tetrafluoride

Updated 10719

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Writers Solution

When a firm is looking at the number of suppliers they should have, it is important to take into consideration the type of business they have as well as the type of relationship they are hoping to have with their supplier.

Respond to…

When a firm is looking at the number of suppliers they should have, it is important to take into consideration the type of business they have as well as the type of relationship they are hoping to have with their supplier.

For example, when a brokerage is looking to get professional photos on all current and future listings, they would benefit from having one photography supplier. One of the advantages of having one supplier is the ability to build a long term partnership that allows both parties to develop methods and expectations that will lower costs. “These close partnerships often lead to high levels of dependency between the customer and the supplier” (Vonderembse, & White, 2013).  Because the brokerage uses one photography company, the ordering and delivery process is seamless and the turn around time is quick. In addition, the cost per photo decreases because of the amount that is ordered and the loyalty they show each other.  It is important that both the brokerage and the photography company develop contingency plans to deal with unexpected problems that may occur. 

The photography company may choose to outsource the editing process and benefits from having multiple suppliers. The reason this works is because no one company can edit the photos fast enough to get them back to the brokerage the following day. By having multiple suppliers the photography company can divide the editing work, and instead of getting photos back 24 hours later, they are able to get edited photos back and sent to the brokerage within 12 hours.  One of the disadvantages this could have is the consistency in quality editing from the multiple sources, it is important to have each supplier deliver the same level of quality. 

In conclusion, when determining if a firm should have one supplier or several, it is crucial to look at the business structure and determine the type of relationships needed to be successful. A large grocery chain will benefit from forward vertical integration, while a brokerage needing photos has no need for it. 

References:

Vonderembse, M. A., & White, G. P. (2013). Operations management [Electronic version]. Retrieved from https://content.ashford.edu

Respond to…

Should a firm attempt to have fewer or more suppliers? What are the advantages and disadvantages of each approach?

My initial response is that it depends on the situation. Looking at it from my organization we have areas where we utilize dozens of suppliers and some where we have only one. The advantage to having fewer or even just one supplier is that these, “relationships enable both parties to work together for greater integration of the supply chain and for development of methods that can improve quality and lower costs,” (Vonderembse & White, 2013, Chap. 5.4). The reason behind having one, in my example, is that it makes it easier to customize those products or services. We use one vendor for all of our shipping supplies. We have customized shipping containers and product specific packaging materials that they have developed around our specifications. In this way we have a working partnership with this vendor.

On the other side of the discussion, we distribute almost 20K different SKUs. In order to carry such a diverse selection for our customer we have dozens of supply vendors. Because of our sales volume, these vendors compete for space within our building especially those with like items. We also have our own manufacturer that produces generic versions of our most popular items. I would relate this to the backward vertical integration discussed in our text (Vonderembse & White, 2013). This gives us flexibility on what products we produce and gives us a competitive advantage over the brand name items, at least from a cost perspective.

Reference

Vonderembse, M. A., & White, G. P. (2013). Operations management [Electronic version]. Retrieved from https://content.ashford.edu/