NEET Chemistry Structure of Atom – Atomic Models, Electrons & Atomic Structure

Structure of Atom is one of the most fundamental chapters in Chemistry. It explains the internal structure of atoms, the particles present inside them, and the arrangement of electrons around the nucleus.

This chapter forms the foundation of modern Chemistry and is highly important for NEET Chemistry.

What is an Atom?

An atom is the smallest unit of an element that retains its chemical properties. It consists of a central nucleus surrounded by electrons.

Important Concepts

Subatomic Particles

Atoms are made up of three basic particles:

Protons
Neutrons
Electrons

These particles determine the mass, charge, and properties of an atom.

1 / 0 100%

Atomic Models

Scientists proposed various atomic models to explain the structure of atoms and the arrangement of electrons.

Electronic Configuration

Electronic configuration describes the distribution of electrons in different energy levels around the nucleus.

Atomic Number and Mass Number

Atomic number represents the number of protons in an atom, while mass number is the total number of protons and neutrons.

Applications

Understanding chemical bonding.
Explaining periodic properties.
Studying atomic spectra.
Foundation of modern chemistry.
Applications in physics and technology.

Importance for NEET

Structure of Atom is a high-weightage chapter in NEET Chemistry. Questions are commonly asked on atomic models, electronic configuration, atomic number, mass number, and subatomic particles. A strong understanding of this chapter helps students build a solid foundation for advanced chemistry topics.

Download

MTG NTA NEET Home Test Series For 2026 Exam