Here's why:
* Melting Point: This is the temperature at which a solid changes into a liquid.
* Boiling Point: This is the temperature at which a liquid changes into a gas.
For arsenic, the melting point is around 817°C (1483°F) and the boiling point is around 613°C (1135°F).
Therefore, arsenic will melt before it boils, which is a common characteristic of most substances.