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5.Q3. Use the periodic table to help you write the condensed electron configuration for the following elements and their most likely ion( if there is one: [KU/2] a) chlorine b) phosphorus Q4. Draw Lewis structure for the following compounds. In each case, count the number of lone pairs and bonding pairs. [C/4] a) SbH3 lone pair = bond pair = b) CFC13 Bond pair = Lone pair = Q5. A photoelectric cell can be used as a "switch" to activate mechanical devices. Also known as an "electric eye" in this application, a photoelectric cell is an evacuated tube covered on one side with cesium metal. When light strikes the coating, SCH4U: UNIT2 ASSESSMENT OF Ms. MAQBOOL electrons are ejected from the atoms and create an electric current. In the absence of light, the electric current is zero. a) Why do you think cesium is an effective metal to use in this application? [A/3] b) Which other metals might be effective? Why? [A/2]
6. Q6. Use the periodic table to help you draw the orbital diagram (for the valence shell only) for the following elements: (A/5] Elements 7. Orbital diagram a) calcium b)nitrogen! c)aluminu m d) neon e) beryllium 4s 3d 4p a. Ca: SCH4U: UNIT2 ASSESSMENT OF Ms. MAQBOOL Q7. In what ways were Dalton's and Thomson's atomic model similar? In what ways were they different? [T/4] Q8. Use VSEPR theory to identify the electron group arrangement (VSEPR shape/geometric shape), and the bond angle of the following molecules whose central atoms have: [T/6] Geometric shape Bond Angle 4 bonding pairs and 1 lone pair 3 bonding pairs and 2 lone pair 3 bonding pairs and 0 lone pair 10.