Here's why:

* Weak intermolecular forces: Hydrogen molecules (H₂) are held together by very weak London dispersion forces. These forces are easily overcome by even a small amount of energy.

* Lightest element: Hydrogen is the lightest element, meaning its atoms have very little mass. This contributes to the weak bonds between molecules.

The melting point of hydrogen is -259.14 °C (-434.45 °F). This makes it the element with the lowest melting point.