Name _____________________________________ Block _____________ Chemistry Video Questions After watching the video titled "The Nucleus," use the information in the video and that you have learned in class to answer the questions. 1st Video Link: http://bit.ly/NucleusCrashCourseChemistry 1. What is the scientific definition of “theory” and how does it differ from the everyday definition? ______________________________________________________________________ ______________________________________________________________________ 2. Who mathematically proved that atoms exist? ______________________________ 3. What are the three subatomic particles that make up an atom? ___________________________________________________________________ 4. The atomic number of silver is 47. Do any other elements have this same atomic number? Explain why or why not? ___________________________________________________________________ 5. What is the name of the force that holds the particles in the nucleus together? ___________________________________________________________________ 6. What do neutrons do in the nucleus? _____________________________________ 7. What is an isotope and what are the two silver isotopes discussed in the video? 2nd Video Link: http://bit.ly/PeriodicTableCrashCourseChemistry4 8. According to the video, about how many elements had been discovered by the 1860's? _________________________________ 9. In the 1860's what were elements studied by, which led to the omission of noble Gases? _______________________________ 10. What did Mendeleev do when a French scientist discovered one of the missing elements from the periodic table?_____________________________________ 11. What is Mendeleev refered to as? (Bold, Highlight, or Circle One) Dmitri Nye the Science Guy or Chemistry Commander or Master of the Elements 12. Which elements must be stored in inert gases or oils? ________________________ 13. Why did Mendeleev publish his periodic table? _____________________________ ______________________________________________________________________ 14. Why was the periodic table in the form of a globe not accepted? _______________ ______________________________________________________________________
