In an atom of antimatter, the "electron" would have a positive charge.

Here's why:

* Antimatter is the opposite of matter. This means that every particle in antimatter has the opposite charge of its counterpart in regular matter.

* Electrons in matter have a negative charge. Therefore, their antimatter counterparts, called positrons, have a positive charge.

So, an antimatter atom would consist of a negatively charged nucleus (made of antiprotons and antineutrons) and positively charged "electrons" (positrons) orbiting it.