atom Meaning

Atom

Definition: An atom is the smallest unit of a chemical element, composed of a nucleus containing protons and neutrons, surrounded by electrons in an electron cloud. Atoms are the fundamental building blocks of matter and retain the properties of their respective elements.

Usage: Atoms combine to form molecules, which in turn make up all substances in the universe. The study of atoms is central to chemistry, physics, and biology.

Etymology: The word “atom” comes from the Greek word “atomos,” meaning “indivisible.” It was derived from “a-” meaning “not” and “tomos” meaning “cut.” The concept was first introduced by ancient philosophers like Democritus and later developed in modern science.

Pronunciation: /ˈæt.əm/ (American English) or /ˈæt.ɒm/ (British English).

Synonyms: Particle, molecule (in broader contexts, although molecules are made up of atoms), unit (in specific contexts).

Antonyms: Whole, macromolecule (in contexts emphasizing larger structures), conglomerate (in the sense of larger, composite objects).

Example Sentence

“Every element on the periodic table is made up of atoms, each with its unique properties and structure.”

Additional Note

Atoms can vary in composition: for example, hydrogen is the simplest atom, consisting of just one proton and one electron, while heavier elements can contain many more protons, neutrons, and electrons. The arrangement and interaction of atoms give rise to the diverse materials and substances observed in the physical world.

The scientist explained that every solid object is made up of countless tiny atoms.
An atom consists of a nucleus surrounded by electrons in various energy levels.
The process of nuclear fusion occurs when atoms combine to form a heavier atom, releasing energy.
Chemists often use the periodic table to identify the properties and behaviors of different atoms.
The concept of an atom was first introduced by ancient philosophers, but it wasn’t until the 19th century that it gained scientific acceptance.

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