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2a: Beginner An oxygen atom is ionized, leaving only 1 electron. Assume that the nucleus is far enough away that we can treat it as a point charge. What is the magnitude and direction of the force felt by the electron? The radius of an oxygen atom is 60 picometers. Take away from the nucleus as the positive direction of force. @electron = -Qproton = -1.602 x 10-190 A. F=+5. 132 X10-7 N B. F=-5. 126 X10-7N C. F=+5.312 X10-8 N D. F=-5.565 X10-8 N