Concept explainers
Interpretation:
The halogen found in the hormones made by normal human thyroid gland needs to be determined.
Concept introduction:
Halogens are present in group 17 of the periodic table. They are electronegative in nature with 7 valance electrons. Halogen can gain 1 electron to complete its octet.

Answer to Problem 60A
Iodine.
Explanation of Solution
The halogen found in the hormones made by thyroid gland is iodine. It is the essential mineral present in body. This gland is also known as endocrine gland.
Thus, the halogen which is present in the hormones formed from normal human thyroid gland is iodine. The deficiency of iodine can cause thyroid disease.
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