Chemistry Brooks 1st: Chapter Four PP Questions

Finish for HOMEWORK: 

Use your powerpoint and book to answer theses questions. These are due tomorrow!!

Chapter Four Section 1

What ideas did Democritis have about the atom? Aristotle?

2. What are the six ideas in Dalton’s atomic theory? How was Dalton’s atomic theory changed over the years? Why?

3. Where does the word “atom” come from? What does it mean?

4 What does the Law of Conservation of mass state?

5. What parts of Dalton’s atomic theory were proven to be incorrect?

Chapter 4 Section 2

6. Define the following terms: Atom, cathode ray, electron, nucleus, proton, neutron

7. Who is credited with the discovery of each of the following subatomic particles(be sure to give an explanation of the experiment used for this discovery)? Electron, Proton, Neutron,

8. Who is credited with the discovery of the nucleus of the atom? What experiment did he perform to make this discovery?

9. What are the charges each of the subatomic particles?

10. What is the relative mass  and the actual mass of each of the subatomic particles?

TOMORROWS WORK:

Chapter 4 Section 3

1.Define the following terms: atomic number, isotope, mass number, atomic mass unit, atomic mass. 

2. What is the atomic number equal to?(two things)

3. Mass number =??? 

4.In the following atom give the number of protons, electrons, and neutrons:K-39, K-40, K-41, Cu-63, Cu-65, Neon-22, Neon-23, 

5. How are the isotopes of the same element different from each other? 

     How do we calculate the weighted atomic mass of an element? 

     Practice problems p.121 # 18Section 4-3 assessment p.121 #’s 23 and 24.