Question

Correctly predict the ionic compound that would form between the atoms rubidium (Rb) and oxygen (O).

Answer 1

Rb2O

Step-by-step explanation:

Rb is a 1+ element and Oxygen is a 2- element. To have a neutral overall charge you must change the molar ratio to have 2 (1+ elements) and 1 (2- element). Together add to 2+(-2)=0. So the overall product is neutral.