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An atom consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons. The chemical elements are distinguished from each other by the number of protons that are in their atoms. For example, any atom that contains 11 protons is sodium, and any atom that contains 29 protons is copper.
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May 20, 2024 · Atom, smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element.
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 divided using any chemical means.
An atom is an extremely small piece of matter. All normal matter – everything that has mass – is made of atoms. This includes solids, liquids, and gases. The atom cannot be broken to parts by chemistry, so people once thought it was the smallest piece of matter that could exist.
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The quantum mechanical model of the atom. (Opens a modal) Quantum numbers. (Opens a modal) Quantum numbers for the first four shells. (Opens a modal) Shells, subshells, and orbitals. (Opens a modal) The periodic table, electron shells, and orbitals.
If you look at an atom on average, if you say this is my atom. Let's say I had two atoms that are bonded to each other. And I were to say, how much of this is actual stuff?
atom, Smallest unit into which matter can be divided and still retain the characteristic properties of an element. The word derives from the Greek atomos (“indivisible”), and the atom was believed to be indivisible until the early 20th century, when electrons and the nucleus were discovered.
This unit is part of the Chemistry library. Browse videos, articles, and exercises by topic.
