Though the word atom originally denoted a particle that cannot be cut into smaller particles, in modern scientific usage the atom is composed of various subatomic particles.

1 day ago · An atom is the basic building block of chemistry. It is the smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter …

Nov 19, 2023 · An atom is the basic building block of matter, consisting of protons, neutrons, and electrons. An atom is the smallest unit of matter that forms a chemical element and cannot be …

Jul 23, 2025 · Atoms are defined as the smallest particle that can exist independently in nature and can participate in a chemical reaction. Atoms are the building block of all the matter in the universe. The …

Jan 24, 2024 · Most atoms have three different subatomic particles inside them: protons, neutrons, and electrons.

Anything that has a mass—in other words, anything that occupies space—is composed of atoms. While its name originally referred to a particle that couldn't be divided any more—the smallest thing …

Learn about the structure of the atom, and how atoms make up matter. An atom is the smallest unit of matter that retains all of the chemical properties of an element.

According to Bohr’s atomic model, an atom has a tiny central nucleus, and electrons move around it in fixed shells or paths just like planets around the sun (but much, much smaller). At first, scientists …

3 days ago · An atom is the smallest particle into which an element can be divided without losing its chemical identity. Atoms consist of a heavy central nucleus surrounded by a cloud of negatively …

Feb 22, 2025 · Atoms are the fundamental building blocks of matter, making up everything in the universe, from the smallest microorganisms to the largest celestial bodies. Each atom consists of …