All questions of Atomic Structure for SSC CGL Exam

Understanding the Fundamental Unit: Atom
The fundamental unit of an element that participates in a chemical reaction is the atom. Here’s why:
Definition of an Atom
- Atoms are the basic building blocks of matter.
- Each element is made up of atoms that define its unique properties.
- An atom consists of a nucleus containing protons and neutrons, surrounded by electrons.
Role of Atoms in Chemical Reactions
- Atoms interact with each other to form chemical bonds, leading to the formation of molecules.
- During chemical reactions, atoms are rearranged, but the individual atoms themselves remain unchanged.
- The conservation of mass principle states that atoms are neither created nor destroyed in a chemical reaction.
Comparison with Other Options
- Neutron: A neutron is a subatomic particle found in the nucleus of an atom, but it does not participate directly in chemical reactions.
- Molecule: A molecule is a group of atoms bonded together, which can participate in reactions, but it is not the fundamental unit of an element.
- Proton: A proton is a positively charged particle in the nucleus of an atom. While it contributes to the identity of the element, it does not act alone in reactions.
Conclusion
In summary, the atom is the smallest unit of an element that retains its chemical properties and is capable of participating in chemical reactions. Understanding this concept is crucial in the study of chemistry and its various applications.