Atomic+Theory

__**Directions:**__ a) list and define all vocabulary from the chapter b) type at least 4 sample problems with step-by-step directions of how to solve the problem; list the correct answers (if your chapter doesn't have math, there are still problems and concepts we learned.) c) link at least 3 websites for additional resources to help with studying d) develop your own LEQ questions for the section - what did you think were the key points we learned?

e) Once your page is done, visit 4 other chapters and answer their LEQ's. (This can be done on a separate piece of paper.)

__Vocab:__

1. Dalton- Discovered the atom and atomic theory, but did not know about anything else 2. Rutherford- Discovered alpha and beta 3. Thompson- Electrons have a negative charge 4. Millikan- Discovered charge of an electron 5. Chadwick- Discovered neutrons 5. Bohr- Levels of electrons 6. Cathode Ray- Electrons observed in vacuum tubes 7. Law of Conservation- The total amount of energy in a system remains constant 8. Law of Multiple Proportions- Masses are a ratio of whole numbers 9. Law of Definite Proportions- Substance always contains same elements 10. Electron Configuration- Arranging electrons in orbitals 11. Isotopes- two or more atoms with the same atomic numbers but different mass 12. Atomic Number- Number of protons in nucleus 13. Atomic Mass- Mass of element 14. Mass Number- Average of all isotope masses 15. Excited State- When an electron has been quantized 16. Quantum Number- Amount of energy needed to jump energy levels 17. Ground State- When electrons are in the lowest energy level

__Concepts:__



__Links:__

-http://atomictimeline.net/index.php

-http://crescentok.com/staff/jaskew/ISR/chemistry/class4.htm

-http://chemistry.about.com/library/blperiodictable.htm

__L.E.Q.s:__

1. How has the atomic theory developed from Dalton's original theory? How much of Dalton's original theory do we still use today?

2. How are elements and electrons organized on the periodic table?