The Periodic Table Live! Report Form

Please complete the following:

First Name:
Last Name:
Email Address:
T.A.'s name
Lab Section Number:

Please read these instructions first. Answer the following questions in the space provided. Once all of the questions are answered, click on the "Write Report" button at the bottom of the page. A new page will load in your browser that contains your answers. Print this new page. You may save this report to disk after clicking on the "Write Report" button and your answers are displayed as part of the web page. The lab computers will not retain a saved copy of your report. The hard disks are erased and rewritten regularly. The printed copy is therefore your only record of your work, so don't lose it. This form MUST be completed on the web. You will not be able to use this web form if you save on a disk and try to use it while not accessing the web server.

1. Use the Video button to observe the reactions of Cs, Rb, K, Na, and Li with water and with acids. Arrange the metals in the order most reactive to least reactive.

Most Reactive > > > > Least Reactive

Describe the observations you made that support your conclusions.

2. PtF6 is an oxidizing agent of unprecedented power, capable of ionizing molecular oxygen (O2), which has a first ionization energy of about 1180 kJ/mol. Using the Charts function, answer the following quesitons.

a) Are there any periods in the periodic table where every element can be ionized by PtF6? (list them)

b) Which elements cannot be oxidized by PtF6? List them.

3. The elements Zr and Hf are very similar chemically and therefore difficult to separate from each other. How did this similarity affect the discovery of hafnium?

What city is hafnium named after? Why?

Discover a property that you could measure in the lab to distinguish pure Zr from pure Hf, and explain why it would work.(Hint: click on the Physical button or the Atomic button under Properties at the upper right of the screen to see physical and atomic properties.)

Do you think you would be able to tell Zr from Hf just by looking at a sample of each? Why or why not?

4. Name three allotropes of carbon.

How did the most recently discovered allotrope get its name?

What is the surprising difference between diamond and graphite?

Rationalize this in terms of bonding differences.

5. Recently a Noble prize winning chemist wrote a play about the discovery of oxygen, over which there has been a little debate for quite some time. How did Joseph Preistly contribute to oxygen's discovery?

How did Antoine Lavoisier contribute?

For the liberal arts majors: what do Lavoisier and A Tale of Two Cities¹ Sydney Carton have in common? (Note: there is no credit for this, and you won't find info. on Dickens characters on the CD.)

6. Research the halogens (group 7A elements). Describe the physical form of each element (color, state of matter). Who first prepared each element? How did each element get its name? Give two commercial uses for each element.
Halogen Color State ofMatter Who prep'd Why named Use 1 Use 2

7. Who discovered Strontium? In what year? Which other elements did that same person discover?

Discoverer(s) Year
Other Elements Discovered

Based on information about this element and its discoverer, suggest a reason why the same person might discover several elements at about the same time.

8. Compare the physical properties of Be, Mg, Ca, Sr, and Ra. Look at the elements and compare their appearance. Comment on any trends in physical properties (including appearance) and relate them to the position of the elements on the periodic table.

Why are you unlikely to do any laboratory experiments with either Be or Ra?

9. Locate the element cerium, which is used in a general chemistry lab. What property, extremely interesting to pyromanics, does metallic cerium possess?

Which two chemists shared in its discovery?

What is the primary "claim to fame" of one of them, and what other elements is he credited with discovering?

Lanthanides like cerium are often used in making glasses. Which lanthanides are used to make glass for welding masks? Why?

10. For an element to be used in the manufacture of overhead power lines, it must have the following four properties:

  1. 1. high electrical conductivity
  2. 2. low hardness (so that it may be drawn into wires)
  3. 3. low density (so that the wires are light and enable power poles to be spaced as far apart as possible)
  4. 4. be reasonably cheap
a) Use the charting function to identify an element that could be used for this purpose.

b) Is any element superior to the one you selected in two or more properties?
List the element(s) and properties.

Why did you reject this/these element(s)?

Click on the button below when you are finished typing your answers.