MCQ Detailed View

The correct answer is Protons, Neutrons & Electrons. These three are called subatomic particles because they are smaller than the atom itself and make up the atom.

Protons are positively charged particles found in the center of the atom, inside a dense area called the nucleus. Neutrons are also found in the nucleus, but they do not carry any charge — they are neutral. Electrons are tiny particles that have a negative charge. They move very fast around the nucleus in specific paths called orbits or energy levels.

Even though electrons are much lighter than protons and neutrons, they play an important role in chemical reactions and bonding between atoms. The number of protons in an atom determines the type of element it is. For example, hydrogen has one proton, helium has two, and so on.

Neutrons help keep the nucleus stable. Without them, the positively charged protons would repel each other.

In simple words, these three — protons, neutrons, and electrons — are the basic building blocks of all atoms. Knowing about them helps us understand how matter is formed and how it behaves.