An element belongs to group 17. It is present in third period and its atomic number is 17. What is the atomic number of the element belonging to same group and present in fifth period?
A. 25
B. 33
C. 35
D. 53
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Answer:
Option D. 53 (iodine) belongs to the same group of element in 2nd period and the 53rd element is present In 5th period of same group.
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The atomic number of the element belonging to group 17 and in the fifth period is 53, and the element is iodine.
Explanation:
- Iodine appears violet at room temperature and iodide ions can be isolated under seawater. Iodine is not soluble in water, however, its solubility can be increased when there are certain iodides mixed in the solution of iodine.
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