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Hydrogen Atom: What Is the Minimum Speed Needed by a Ground-State

Question 21

Multiple Choice

Hydrogen atom: What is the minimum speed needed by a ground-state hydrogen atom for its kinetic energy to be enough to ionize the atom in a collision? (1 eV = 1.60 × 10-19 J, mh ≈ mproton = 1.67 × 10-27 kg)


A) 44.2 km/s
B) 21.7 km/s
C) 66.5 km/s
D) 113 km/s
E) 51.0 km/s

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