According to the theory of atoms, the motion of atoms in a substance changes as you add or remove heat. The beakers below show the arrangement of atoms for a substance in different states. Which beaker shows what the arrangement of atoms would be like if you added heat to a gas?

A. Beaker A
B. Beaker A and Beaker B
C. Beaker B and Beaker C
D. Beaker C
E. Either Beaker A or Beaker C

Adding heat to a gas increases the kinetic energy of atoms, causing them to move faster and become more widely separated; hence, the correct beaker showing this change is beaker C. Therefore the correct option is D

Explanation:

According to the theory of atoms, the motion of atoms in a substance changes as you add and remove heat. If you add heat to a gas, the kinetic energy of the atoms increases, causing them to move even faster and further apart.

Since beaker A shows atoms moving rapidly and beaker C shows no atoms (implying that they're moving too fast to be seen or too widely spread), the beaker that would represent the arrangement of atoms in a gas when heat is added is beaker C.

This is because adding heat to a gas increases the energy and movement of its particles, potentially to the point where they are no longer contained in the beaker, analogous to the state of plasma.