What is the correct formula for the compound made by magnesium and nitrogen?
Magnesium is in Group 2, nitrogen is in Group 15; the formula is as you would predict from magnesium ion,
Magnesium and nitrogen combine to form magnesium nitride,
Magnesium nitride is an ionic compound. Magnesium forms ions with a
An easy way to determine the formula unit of an ionic compound is called the crisscross method, as demonstrated in the video below.