1. What results from the gold foil experiment caused the need for a change in the model of the atom in use at that time? a. The deflection of alpha particles by the gold atoms b. The line spectra of elements c. The absorption of energy during alpha particle collisions with the gold foil d. The fact that most alpha particles went straight through the gold foil 2. Using the electronegativity values given, which of the following bonds would be the most polar? Carbon = 2.5 Phosphorus 2.2 Sulfur = 2.5 Aluminum 1.6 a. Carbon- Sulfur b. Aluminum – Oxygen Oxygen = 3.5 c. Phosphorous-Oxygen d. Carbon - Phosphorus

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