Скачать или смотреть What is an Atom | Atom Definition | Chemistry | Electron | Proton | Neutron | Chemistry Basics

What is an Atom | Atom Definition | Chemistry | Electron | Proton | Neutron | Chemistry Basics
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Atoms are the basic building blocks of matter. Everything around you—air, water, plants, people—is made of atoms.

Structure of an atom

An atom has three main parts:

Protons – positively charged particles in the nucleus

Neutrons – neutral particles in the nucleus

Electrons – negatively charged particles that move around the nucleus

Key points

Atoms of the same element have the same number of protons

Different elements have different kinds of atoms

Atoms can join together to form molecules (like H₂O for water)

Example

A hydrogen atom has 1 proton

A carbon atom has 6 protons

In one sentence:
An atom is the smallest particle of an element that can take part in chemical reactions.

If you want, I can also explain this with a diagram, examples, or in very simple exam-ready language