The compound between sulfur and magnesium is magnesium sulfide, represented by the chemical formula MgS. This compound forms when magnesium, a metal, reacts with sulfur, a non-metal.
Magnesium has a valency of +2, while sulfur has a valency of -2. When they combine, magnesium donates two electrons to sulfur, allowing them to bond together in a one-to-one ratio, resulting in the formation of magnesium sulfide.
Magnesium sulfide typically appears as a white or yellowish solid and is known for its use in various applications, such as in the production of sulfur and in some types of batteries. Additionally, when magnesium sulfide is exposed to water, it reacts to form hydrogen sulfide, a gas that has a characteristic rotten egg smell.