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ATOMIC STRUCTURE
Question #23787
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Question
What is the threshold frequency for potassium metal?
A. 4.3 × 10¹⁴ Hz
B. 4.6 × 10¹⁴ Hz
C. 5.0 × 10¹⁴ Hz
D. 5.2 × 10¹⁴ Hz
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