Question

Which of the following statements is NOT true of atoms and molecules?

A They are tiny molecules.
B They are always in motion.
C They are found in all matter.
D They never bump into each other.

Answer 1

The incorrect statement is that atoms and molecules never bump into each other; they are always in motion and collide, especially in gases.

Step-by-step explanation:

The statement that is NOT true of atoms and molecules is: D They never bump into each other. In reality, atoms and molecules are always in motion and do bump into each other, particularly in gaseous states where they fly about freely and collide frequently. Brownian motion, the random movement observed in particles suspended in a fluid, is a direct result of such molecular collisions. The concept of Brownian motion also helped to confirm the existence of atoms and molecules and determine their sizes.