3 Periodic Trends

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C.5C: Periodic Trends Matter and the Periodic Table Periodic Trends 3 C.5C: Periodic Trends Matter and the Periodic Table Atomic Radii Periodic Trends 2 C.5C: Periodic Trends Matter and the Periodic Table Ionic Radii Periodic Trends 1 Periodic Trends Matter and the Periodic Table Periodic Table 1 Periodic Trends Matter and the Periodic Table Periodic Table 1 Periodic Table Trends Practice Question Each rectangle represents the Periodic Table. Label one rectangle “Atomic Radii”, one rectangle “Ionic Radii”, one rectangle “Electronegativity/Electron Affinity”, and one rectangle “Ionization Energy”. Draw TWO arrows on each labeled indicating the trends. **Indicate if the arrow is increasing or decreasing. Example Increasing Valance Electrons Match each of the four trends listed to its description by writing the correct letter of the description next to the trend’s name. Trends _____ Ionic Radius _____ Electronegativity _____ Ionization Energy _____ Atomic Radius Descriptions A. The amount of energy needed to remove an electron from a neutral atom B. The radius of a neutral atom C. The radius of a positive or negative ion D. The ability of an element to attract electrons when forming a chemical bond Answer the following questions using your notes as a guide. 1. Which element below has the smallest atomic radius? _______________ Beryllium(Be) Oxygen(O) Sodium(Na) Fluorine(F) 2. Which element below has the smallest ionic radius? _________________ Lithium(Li) Sodium(Na) Rubidium(Rb) Potassium(K) 3. Which element below has the lowest electronegativity? ______________ Calcium(Ca) Gallium(Ga) Selenium(Se) Bromine(Br) 4. Which element below has the highest ionization energy? _____________ Strontium(Sr) Beryllium(Be) Magnesium(Mg) Calcium(Ca) 5. Which element has the highest electronegativity on the Periodic Table? 6. Which representative element has the largest atomic radius? 7. Place the elements below in order of decreasing ionization energy. Aluminum(Al) Chlorine(Cl) Magnesium(Mg) Sulfur (S) [largest] __________ __________ __________ __________ [smallest] 8. Place the elements in order of increasing atomic radius. Gallium(Ga) Nitrogen(N) Indium(In) Tellurium(Te) [smallest] __________ __________ __________ __________ [largest] 9. Choose which of the two is larger, the atom or its ion. A. Magnesium atom (Mg) OR Magnesium ion (Mg2+) ________________ B. Oxygen atom (O) OR Oxygen ion (O2-) ________________ .

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