Here's why:

* Protons: The nucleus contains protons, which are positively charged particles.

* Neutrons: It also contains neutrons, which are neutral particles.

* Charge: The positive charge of the protons is what gives the nucleus its overall positive charge.

* Location: The nucleus is located at the center of the atom, with the negatively charged electrons orbiting around it.

Let me know if you have any more questions!