Question

Chlorine has two naturally occurring isotopes, Cl 35 (isotopic mass =34.9689 amu) and Cl 37 (isotopic mass =36.9659 amu). a) What is the mass number of each isotope? b) How many protons, neutrons, and electrons are present in each?

Answer 1

Answer: The first isotope has a mass number of 35 while the other has a mass number of 37

Explanation:

For 37Cl17

Protons 17

Electrons 17

Neutrons 20

For 35Cl17

Protons 17

Electrons 17

Neutrons 18

The difference between isotopes is always in the number of neutrons present in each one.