Chemistry > QUESTIONS & ANSWERS > Questions and Answers > GIZMOS: Student Exploration: Trends in the Periodic table (All)

Questions and Answers > GIZMOS: Student Exploration: Trends in the Periodic table

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Trends in the Periodic table 1. Examine your graph of ionization energy (IE) vs. atomic number. A. Which elements are found at the main peaks of your graph (there should be three)?... What do these elements have in common? [2] B. Which elements are found at the main valleys of your graph (there should be three)? What do these elements have in common? [2] 2. Examine your graph of atomic radius vs. atomic number. They also give away electrons What do these elements A. Which elements are found at the main peaks of your graph? have in common? [2] B. Which elements are found at the main valleys of your graph? What do these elements have in common? [2] 3. How are the atomic radii and IE related (i.e. as the radius increases, what happens to the IE)? [2] 4. Generally, as you go from left to right across a period on the periodic table, what happens to atomic radius? What happens to IE? [2] 5. Generally, as you go down a group in the periodic table, what happens to atomic radius? What happens to IE? [2] 6. When Na forms an ion it loses its outer electron to become Na+. Draw a B-R diagram for BOTH Na and Na+. What element does Na+ resemble (with respect to electron arrangement)? In general, which groups’ electron configuration do the alkali metals resemble when they form ions? (I.e. lose an outer electron)? [4] 7. Why does the radius increase as you go down a group (hint: think of B-R diagrams)? Why would an increase in radius make it easier to lose an outer electron (i.e. give a lower ionization energy)? [3] 8. What happens to the number of protons in the nucleus as you go across a period? Use this to explain the trends in atomic radius and ionization energy across a period. [3] [Show More]

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