For each of the following pairs of ions, write the chemical formula for the ionic compound that they would form. Use proper notation and place the cation first.

Question

For each of the following pairs of ions, write the chemical formula for the ionic compound that they would form. Use proper notation and place the cation first.

A) Na+ and Se2-

Answer 1

To combine Na⁺ and Se^2- you will need 2 of the Na+ to balance out / equalize the 2- on Se

Na₂Se (sodium selenide)