How are isotopes of the same element alike? different?

Question

anonymous · Answer

Simply, isotopes are two or more forms of the same element that contain the same number of protons (or proton number) but with different nucleon number.
For example the regular Carbon atom has a proton number of 6 and a neutron number of 6. (called Carbon-12) while another form of Carbon (which is its isotope) Carbon -13 has a proton number of 6  and a neutron number of 7.
They  are the same because they have the same proton number they have the same ...

anonymous · Answer

Isotopes usually share the same chemical properties

anonymous · Answer

But have different mass weight