Question

magnesium generates a very bright light.
burning
heating
both burning and heating

Explanation:

When magnesium burns (\(2Mg + O_{2}\xrightarrow{\text{ignition}}2MgO\)), it reacts with oxygen in the air. This chemical reaction releases a large amount of energy in the form of a very bright white - light. Heating magnesium (without reaching the ignition point for combustion with oxygen in the air) does not produce such a bright light. Heating may just cause a physical change (melting at \(650^{\circ}C\)) or a very slow chemical reaction (if in contact with some reactive substances at a very slow rate) without the bright - light emission characteristic of combustion.

Answer:

Burning