Naomi is testing the different properties of an unknown solid. Her results are located in the chart. Which statement describes the chemical nature of the bonding in the substance?

When chilled, the atoms rolled over each other while still staying together, causing a lower temperature.
When heated, the valance electrons increased their speed and transferred the heat from electron to electron.
When treated with light, the atoms rolled over each other while still staying together, causing a reflection of light.
When treated with an applied force, the valence electrons increased their speed and transferred the change from electron to electron.