What are the similarities and differences between atoms of the isotopes Cl-35 and Cl-37

The numbers 35 and 37 are the mass numbers for the two isotopes of chlorine. They both have the same atomic number(proton number) as they are the same element, hence they also have the same number of electrons. Therefore, they have similar chemical properties, as the electrons determine the chemical property of an element. Since they have different mass numbers, they have different numbers of neutrons, thus the two isotopes have different physical properties.