On the atomic level, energy and matter exhibit

the characteristics of

(1) particles, only

(2) waves, only

(3) neither particles nor waves

(4) both particles and waves

On the atomic level, energy and matter exhibit the characteristics of " (4) both particles and waves" which is one of the most important concepts in physics.

Answer;

Both particles and waves

On the atomic level, energy and matter exhibit the characteristics of both particles and waves.

Explanation;

Matter is anything that has mass and takes up space (volume) and all matter is made up of atoms.

Energy is produced from matter yet has no mass and is the capacity to do work while matter is the physical "stuff" in the universe.

Matter can obtain energy in two different ways through either potential energy or kinetic energy.