Identify the physical properties

A physical property is any property that is measurable, whose value describes a state of a physical system.

Explanation:

The changes in the physical properties of a system can be used to describe its changes between momentary states. Physical properties are often referred to as observables. They are not modal properties

the answer is a. co2, this would be colder than the : )

explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.