what type of element can turn into both solid and liquid form depending on the temperature of its surroundings?

EVERY element can turn into solid, liquid, or gas, depending on its own temperature and the pressure of its surroundings. The temperature of its surroundings doesn't matter.

An Atom can turn into both solid and liquid form depending on the temperature of its surroundings

Explanation:

Scientists have discovered a new state of physical matter in which atoms can exist as both solid and liquid simultaneously. Researchers have found, however, that some elements can, when subjected to extreme conditions, take on the properties of both solid and liquid states.