Here's a breakdown of how the atomic structure of boron isotopes is both the same and different:

Same:

* Number of Protons: All boron isotopes have 5 protons. This defines boron as the element boron. The number of protons is the element's atomic number.

Different:

* Number of Neutrons: Isotopes of the same element differ in the number of neutrons. Boron has two common isotopes:

* Boron-10: Has 5 protons and 5 neutrons.

* Boron-11: Has 5 protons and 6 neutrons.

In summary: Boron isotopes have the same number of protons (atomic number), but differ in the number of neutrons, which affects their atomic mass.