As the number of atoms increases, the number of particles also increases. This is because atoms are composed of subatomic particles, namely protons, neutrons, and electrons. Each atom contains a specific number of these particles, and as you increase the number of atoms, you are essentially adding more of these particles into the system.
In most cases, when referring to the number of particles, we are primarily concerned with the number of electrons since they are the most abundant subatomic particles in atoms. Each atom typically has an equal number of protons and electrons, resulting in a neutral charge. Therefore, the number of electrons is directly proportional to the number of atoms.
However, it's worth noting that if you're considering a scenario where atoms undergo nuclear reactions, such as fusion or fission, the number of particles can change. These reactions involve the release or absorption of subatomic particles, such as neutrons and other types of particles, which can alter the overall number of particles in the system. But if we're discussing a simple increase in the number of atoms without nuclear reactions, then the number of particles, specifically electrons, will increase proportionally.