Chapter 15, Problem 5RQ

To determine

The center of every atom.

Answer to Problem 5RQ

At the centre of every atom, there is an atomic nucleus which consists of proton and neutrons.

Explanation of Solution

During the early 19th century, scientists realized through their experiments that atoms are not the smallest particles of matter. Instead, atoms themselves are made up of even smaller particles called subatomic particles.

These subatomic particles include protons, neutrons, and electrons. Protons, as well as neutrons, are joined together at the atom’s center to form the atomic nucleus. The nucleus is a relatively heavy core that makes up most of an atom’s mass.

Conclusion:

Therefore, at the centre of every atom, there is an atomic nucleus which consists of proton and neutrons.