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Atoms are the basic particles of the chemical elements. 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, … See more
In philosophy
The basic idea that matter is made up of tiny indivisible particles is an old idea that appeared in many … See more
Nuclear properties
By definition, any two atoms with an identical number of protons in their nuclei belong to the same chemical element. Atoms with equal … See moreBaryonic matter forms about 4% of the total energy density of the observable universe, with an average density of about 0.25 particles/m (mostly See more
• Oliver Manuel (2001). Origin of Elements in the Solar System: Implications of Post-1957 Observations. Springer. ISBN 978-0-306-46562-8 See more
Subatomic particles
Though the word atom originally denoted a particle that cannot be cut into smaller particles, in modern … See moreWhile atoms are too small to be seen, devices such as the scanning tunneling microscope (STM) enable their visualization at the surfaces of solids. The microscope uses the quantum tunneling phenomenon, which allows particles to pass through a … See more
Wikipedia text under CC-BY-SA license Atom | Definition, Structure, History, Examples, Diagram, & Facts ...
- An atom is the basic building block of chemistry. It is the smallest unit into which matter can be …
Are all atoms the same size? - All atoms are roughly the same size, whether they have 3 or 90 electrons. Approximately 50 mill…
What does the mass of an atom consist of?
- An atom is the basic building block of chemistry. It is the smallest unit into which matter can be …
2.2: Atomic Structure - Chemistry LibreTexts
May 18, 2021 · Atoms have protons and neutrons in the center, making the nucleus, while the electrons orbit the nucleus. The modern atomic theory states that atoms of one element are …
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Jan 30, 2023 · An atom consists of a positively charged nucleus surrounded by one or more negatively charged particles called electrons. The number of protons found in the nucleus …
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