Hello. This question is incomplete. The full question is:
"To demonstrate the arrangement of atoms in liquids, a teacher tapes off a circular section on the classroom floor. How should the students modeling as atoms of liquids stand or move in the taped-off section?
a. They should leave some vacant space and move around one another. b. A few students should move about holding hands in one half of the space. c. They should all squeeze close together so that there is no vacant space. d. A few students should run randomly in the entire space within the section."
Answer:
They should leave some vacant space and move around one another.
Explanation:
The closer the atoms meet, we can say that the more "solid" the substance will be. As the atoms move away, the substance becomes liquid and, moving further away, becomes a gas. Understanding how this works, it is easy to understand the changes in physical state caused by the change in temperature.
In this case, in order for the students to be able to represent the arrangement of the atoms in a liquid substance, they should leave a little free space within the section and move around. If they stayed together to the point where they were unable to move, they would be representing a solid substance. If they left a lot of space in the section and moved at random they would be representing a gaseous substance.
