Unit 02 Review: Atomic Structure and Periodic Table
- 1. What did Henry Moseley do to contribute to the advancement of our knowledge about atoms? How did he improve the Periodic Table?
- 2. That thing Moseley did to improve the Periodic Table, why didn't Mendeleev to that when he designed the it?
- 3. Elements in the same ___________ have similar chemical properties.
- 4. Which would hold on to its electrons most strongly: anion or cation. Why?
- 5. What group contains the alkali metals? What are the properties of the alkali metals?
- 6. In a neutral atom the number of __________ equals the number ______________.
- 7. What group contains the noble gasses. What makes the noble gasses so special?
- 8. Atomic radii (decrease/increase) as you go up and to the right on the Periodic Table.
- 9. What is Electronegativity? What is the trend for electronegativity on the Periodic Table?
- 10. Which subatomic particle was discovered using the cathode ray tube?
- 11. Rutherford's gold foil experiment led to the discovery of a tiny massive nucleus surrounded by a relatively enormous area of empty space that has nearly massless electrons moving through it. What happened in the experiment to lead Rutherford to develop this model of the atom?
- 12. Briefly describe the contributions of the following chemists: Dalton, Thompson, Rutherford, Bohr, Moseley, Medeleev.
- 13. How is it possible for atoms of the same element to have different mass numbers?
- 14. Why are the elements in groups 1A, alkali metals, and 7A (17), halogens, so reactive?
- 15. What are the properties of metals, metalloids, and nonmetals?
- 16. What is the easiest way to determine how many valance electrons are found in a representative element?