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HomeHomework HelpchemistryAtomic Structure

Atomic Structure

The study of the composition and properties of atoms, including atomic radii, atomic mass, and the arrangement of electrons, protons, and neutrons, which is fundamental to understanding the behavior of matter and chemical reactions

beginner
2 hours
Chemistry
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Overview

Atomic structure is fundamental to understanding chemistry and the behavior of matter. Atoms, composed of protons, neutrons, and electrons, form the basis of all substances. The arrangement and interaction of these particles determine the properties of elements and compounds. Understanding atomic st...

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Key Terms

Atom
The smallest unit of an element, consisting of protons, neutrons, and electrons.

Example: A hydrogen atom has one proton and one electron.

Proton
A positively charged subatomic particle found in the nucleus of an atom.

Example: The number of protons defines the element.

Neutron
A neutral subatomic particle found in the nucleus of an atom.

Example: Neutrons contribute to the mass of an atom.

Electron
A negatively charged subatomic particle that orbits the nucleus of an atom.

Example: Electrons are involved in chemical bonding.

Atomic Number
The number of protons in the nucleus of an atom, which determines the element.

Example: Carbon has an atomic number of 6.

Mass Number
The total number of protons and neutrons in an atom's nucleus.

Example: Carbon-12 has a mass number of 12.

Related Topics

Chemical Bonding
The process by which atoms combine to form molecules.
intermediate
Periodic Table
A tabular arrangement of elements based on their atomic number and properties.
intermediate
Nuclear Chemistry
The study of the chemical and physical properties of elements as influenced by changes in the structure of the nucleus.
advanced

Key Concepts

AtomsSubatomic ParticlesAtomic NumberMass Number