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The atomic radius of Li, Na and K are 1: 33A, 1. 54A and 1....

Chemistry
JAMB 1989
The atomic radius of Li, Na and K are 1: 33A, 1. 54A and 1. 96A res pectively. Which of the following explaqins this gradation in atomic radius?
  • A. electropositivity decreases from Li to Na to K
  • B. electronegativity decreases from Li to Na to K
  • C. the number of the electron shells increases from Li to Na to K
  • D. the elements are in the same period
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Correct Answer: Option C
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