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Download Chemistry Unit 4: The Periodic Table – Reading
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Chemistry Unit 4: The Periodic Table – Reading Assignment All reading assignments are to be completed in Cornell Note format – or NO CREDIT Section 4.1; p 100 1. Define ground and excited states of an atom: 2. What happens to the atom when it goes from the excited state by to ground state? p 102-103 3. Describe the Bohr’s Model (Planetary Model) of the atom : 4. What were the limitations of the Bohr Model? Section 5.1; pp 133-137 5. What is meant by periodic? 6. How did Mendeleev place the elements in his periodic table? 7. 40 years after Mendeleev’s periodic table, Moseley proposed a better way of organizing the elements. What did he propose? 8. State the periodic lab. 9. What is the periodic table? 10. Where are the lanthanides and actinides located on the table, and why? Section 5.2; pp 138-149 11. Vertical columns are known as ______. What do those elements share in common? 12. Horizontal rows are known as ______. What do those elements share in common? 13. List the name and properties of the elements in groups 1, 2, 17, & 18. 14. Why is hydrogen in a family of its own? 15. What elements make up the “main group” elements (column numbers)? 16. What about the periodic table also tells you the number of outer, or valence electrons for an atom? 17. Why are valence electrons so important to us? 18. Name the 6 metalloids. What are their general properties? Section 5.3; pp 150-164 19. What is another name for the size of the atom? 20. Define periodic trend 21. What is the periodic trend for atomic radii, moving from left to right across a period. What is the main factor for determining this trend? 22. What is ionization energy? 23. What is the periodic trend for ionization energy, moving from left to right across a period. What is the main factor for determining this trend? 24. What is meant by shielding energy? 25. Why are the 2nd and 3rd ionization energies greater than the 1st? 26. What is electron affinity? 27. What is the periodic trend for electron affinity, moving from left to right across a period? What is the main factor determining this trend? 28. What is a positive ion called? A negative ion? 29. How does a cation size (radii) compare to the original atom it came from? An anion? 30. What is electronegativity? What is the main difference between electronegativity and electron affinity? 31. Which element has the highest electronegativity value? 32. What is the periodic trend on electronegativity, moving from left to right across a period? What is the main factor for determining this trend?
