The radius of the first orbit of hydrogen is 0.53 Å. Which orbit has a radius of 4.77 Å?
Correct answer: C. Third
- A. First
- B. Second
- C. Third
- D. Fourth
Explanation
The radius of any orbit can be calculated by using formula n^2 (0.53) For 1st orbit; (1)^2(0.53) = 0.53Å For 2nd orbit; (2)^2(0.53) = 2.12Å For 3rd orbit; (3)^2(0.53) = 4.77 Å So, 4.77 Å is radius for third orbit. Hence, option C is correct.
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