An unknown element was observed to have the following properties:
1. It appears as a silvery liquid.
2. It has a density of 13.53 g/cm³ at room temperature.
3. It reacts with molecular iodine to produce a red solid.
4. It freezes at −38.83 °C and boils at 356.73 °C.
5. It forms a yellow solid when combined with dilute nitric acid.
Classify each property as physical or chemical.