Assignments

Assignments for 4/26/2010:

•  Please read chapter one of your book. We wil be discussing it in class, but the more you expose yourself to the information, the better you will do in my class. (0 points).
  
• In your science notebook, please include the following assignment under the chapter one tab, behind your class notes. (50 points). Due 4/28/2010

1. Define the following terms: element, compound, and mixture. Please give an example of each.
2. Please classify the following accordingly (elements, compounds, or mixtures);
   
   1. diamond
   2. brass
   3. soil
   4. glass
   5. cotton
   6. milk of magnesia
   7. salt
   8. iron
   9. steel
3. Describe some of the evidence for the existence of atoms and some fo the evidence from our senses that seems to deny the existence of atoms.
   
4. According to Dalton, how do atoms of different elements differ?
5. Describe the differences between a proton, a neutron, and an electron?
6. Which one of Dalton's assumptions is nwo known to be in error. Which one is it?
7. Identify the simmilariteis and differences between iron and mercury?
8. Please list the fundamental subatomic particles that make up an atom and give the corresponding charge.
9. What is a neutral atom?
10. How does the radius of an atom compare to the size of the nucleus?

• If you did not submit your element for the element project to me, please do so now! (5 points).
  
• For friday, please complete the assignment that is describe below. We will be discussing most of the content in class. Remember you have a book for a reason.

1. Describe the relationship between atomic number, mass number, number of protons, number of neutrons, and number of elecgrons in a calcium atom, ⁴⁰Ca.
   
2. Write the symbol for the atom that contains 24 protons, 4 electrons, and 28 neutrons.
3. How many times heavier is a ⁶Li atom than a ¹H atom?
4. If you were to slect on exygen atom at random, what would its mass in grams most likely be?
5. Describe the difference between the following
   1. H and H⁺
   2. H and H^-
   3. 2H and H₂
   4. H⁺ and  H^-
6. Caculate the number of elctrons, protons, and neutrons in a ¹³⁴Ba²⁺ion.
   
7. What are polyatomic ions?
8. What do all isotopes of oxygen have in common? In what ways are they different
9. What is the ratio of the mass of a ¹²C atom and a ¹³C atom?
10. Draw a general structure of an element of your choice.

• Contiunte to work on your element project! (500 Points).