1.

Chlorine has fractional average atomic mass. Justify this statement.

Answer»

Solution :Chlorine molecule has two isotopes as in `""_(17)Cl^(35) , ""_(17)Cl^(37)` in the RATIO of 77 : 23, so when we are calculating the AVERAGE ATOMIC mass, it becomes fractional.
The average relative atomic mass of Chlorine =`((35xx77)+(37xx23))/100 = 34.46` amu


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