* Metal and Nonmetal: It's composed of strontium (Sr), a metal, and the hydroxide group (OH), which contains a nonmetal (oxygen) and a hydrogen. Ionic compounds typically form between metals and nonmetals.

* Electrostatic Attraction: Strontium loses electrons to form a positively charged ion (Sr²⁺), while the hydroxide group gains electrons to form a negatively charged ion (OH⁻). These oppositely charged ions are held together by strong electrostatic forces.

Let me know if you have any other questions about chemical compounds!