When two atoms combine by transferring electrons, it's called an ionic bond.

Here's why:

* Transfer of Electrons: One atom loses electrons (becoming a positively charged ion - cation) while the other atom gains electrons (becoming a negatively charged ion - anion).

* Electrostatic Attraction: The oppositely charged ions are then attracted to each other due to electrostatic forces, forming an ionic bond.

Let me know if you'd like more details on ionic bonds!