Question : Which element of Group 17 has two isotopes of masses 35 and 37 amu with an average abundance of 75.77% and 24.23%, respectively?
Option 1: Chlorine
Option 2: lodine
Option 3: Fluorine
Option 4: Astatine
Correct Answer: Chlorine
Solution : The correct option is Chlorine .
Two isotopes of chlorine, Cl-35 and Cl-37, constitute 75.77% and 24.23%, respectively, of the element. Cl-35 has an atomic mass of 34.969 amu, whereas Cl-37 has a mass of 36.966 amu. It has the atomic number 17 and is a greenish-yellow element. It is a highly reactive gas and is used in disinfectants and polymers.
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