What is mg + br2?

Mg + Br2 refers to the chemical reaction between magnesium (Mg) and bromine (Br2), which yields magnesium bromide (MgBr2). This is a synthesis reaction in which two elements combine to form a compound. The balanced chemical equation for this reaction is:

Mg + Br2 → MgBr2

In this reaction, magnesium is oxidized while bromine is reduced. The reaction is highly exothermic and typically occurs with the release of heat and light. Magnesium bromide has a white crystalline structure and is soluble in water. It is commonly used as a catalyst in organic synthesis reactions and as an electrolyte in batteries.