Select the correct answer. Which is the formula for magnesium nitride? A. Mg_(3)N_(2) B. MgN C. MgN_(2) D. Mg_(3)N E. MgN_(3)

The correct answer is A. $Mg_{3}N_{2}$.<br /><br />Magnesium nitride is a compound formed by the reaction of magnesium (Mg) with nitrogen (N). The formula for magnesium nitride is $Mg_{3}N_{2}$, which indicates that there are three magnesium atoms bonded to two nitrogen atoms.<br /><br />The other options are incorrect:<br /><br />B. MgN - This is not the correct formula for magnesium nitride. It represents a different compound, magnesium mononitride.<br /><br />C. $MgN_{2}$ - This is not the correct formula for magnesium nitride. It represents a different compound, magnesium dinitride.<br /><br />D. $Mg_{3}N$ - This is not the correct formula for magnesium nitride. It represents a different compound, magnesium mononitride.<br /><br />E. $MgN_{3}$ - This is not the correct formula for magnesium nitride. It represents a different compound, magnesium trinitride.<br /><br />Therefore, the correct formula for magnesium nitride is $Mg_{3}N_{2}$.