The atomic weight of Cl is:
35
35.5
36
37
Chlorine is a chemical element with symbol Cl and atomic number 17. It has a relative atomic mass of 35.5.
Naturally occurring chlorine consists of two isotopes whose atomic weights are 35 and 37. The atomic weight of natural chlorine is 35.5, then what is the ratio of Cl35 to Cl37?
The average atomic mass of Cl35 & Cl37 is 35.5. Then % abudance Cl35 of is