Chemistry 100 Dunnivant

Exam 1 Spring, 2004

Name (printed) _____________________

Closed notes, closed book, closed Internet, closed neighbor!

I have neither given nor received aid on this exam. __________________________

Signature

1. (10 pts) For this question I want you to integrate your major (or potential major) and science. Please use the computer room on first floor to type your answer. In a strict one-half page typed discussion, tell how your field of study is affected by science or how your field affects the understanding of scientific knowledge. You may pick a specific example, such as global warming or DDT pollution, or you may discuss this in a more philosophical way. Your answer must be well thought out and organized.

2. (3 pts) List three examples of physical properties.

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3. (2 pts) Water has many unique chemical and physical properties. What molecular property is responsible for this phenomenon?

4. (5 pts) What is the difference between a molecule and a compound?

5. (10 pts) Using the blank spaces below, give the order of electromagnetic radiation from highest energy to lowest energy. Here are your categories: UV, Infrared, gamma, radio, visible, x-rays, TV-FM radio, AM radio, microwaves, and long radio waves.

____________________ highest energy

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____________________ lowest energy

6. (15 pts) Let’s face it, early scientists had some pretty weird (and weak) theories about atomic structure. But, early in the 1900s modern science developed much more advanced theories with the discovery of the electron. Starting with the work of Thomson and ending with Bohr (including Bohr), give a detailed discussion of what was discovered, the experiments involved, and who did them. Limit your discussion to ONE typed page. You need not draw diagrams for the experiments, but do mention them.

7. (5 pts) An atom has 24 protons and a mass number of 54.

What is the name of the element? ___________________

How many neutrons does it have? ___________________

How many electrons does it have? ___________________

What is its mass number? ___________________

8. (10 pts) Give the spectroscopic notation for:

Mg __________________________________________

What are its valence electrons? __________________________

Sn __________________________________________

What are its valence electrons? __________________________

9. (2 pts each) Give the name or the chemical formula for the following:

Ca(OH)₂ ________________________

Sodium cyanide ________________________

Cr ________________________

Co ________________________

Cu ________________________

Strontium phosphate ________________________

Carbonate ________________________

KNO₃ ________________________

Sodium bicarbonate ________________________

NaCl ________________________

10. (5 pts each) Draw the Lewis dot structure for

CO₂

Nitrate ion

O₃

H₂CO₃ HCO₃^- CO₃^2-