### Instruction:
Given this paragraph about magnesium, what is the melting point of magnesium in celsius?

### Input:
Elemental magnesium is a gray-white lightweight metal, two-thirds the density of aluminium. Magnesium has the lowest melting (923 K (650 °C)) and the lowest boiling point 1,363 K (1,090 °C) of all the alkaline earth metals.

### Response:
The melting point of magnesium is 650 °C.