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Related Concept Videos

Atomic Structure01:33

Atomic Structure

All matter is composed of atoms, the smallest individual units of elements. Each atom is made up of three subatomic particles: protons, neutrons, and electrons. Together, these three particles account for the mass and the charge of an atom.The History of Atomic TheoryThe first person to propose that everything on Earth is made up of tiny particles was the Greek philosopher Democritus, around 450 B.C. He used the term atomos, Greek for “indivisible,” from which the modern term “atom” is derived.
Electron Behavior00:54

Electron Behavior

Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.Electrons Orbit the NucleusElectrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus...
Subatomic Particles03:37

Subatomic Particles

Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
Electronic Structure of Atoms02:28

Electronic Structure of Atoms


An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum numbers:  n, l, ml, and...
Atomic Structure01:17

Atomic Structure

The Greek philosopher Democritus proposed that everything on Earth is made up of tiny particles called atomos, Greek for "indivisible," from which the modern term "atom" is derived. In the 19th century, John Dalton proposed the atomic theory that is still largely correct today. He put forth five postulates to explain how atoms made up the world around us. (1) All matter is composed of infinitely small particles or atoms. (2) All atoms of a given element are identical to one another and (3) are...
Electron Behavior01:09

Electron Behavior

Electrons are negatively charged subatomic particles attracted to and orbit around the positively-charged nucleus of an atom. They reside in spaces associated with energy levels called shells and are further organized into subshells and orbitals within each shell.
Electrons Orbit the Nucleus
Electrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus have less energy,...

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Related Experiment Video

Updated: Jun 28, 2026

Single-Molecule Imaging of Nuclear Transport
12:13

Single-Molecule Imaging of Nuclear Transport

Published on: June 10, 2010

Visibility of single atoms.

A V Crewe, J Wall, J Langmore

    Science (New York, N.Y.)
    |June 12, 1970
    PubMed
    Summary

    High-resolution scanning electron microscopy now allows imaging of individual heavy atoms on carbon substrates. This breakthrough advances atomic-scale visualization capabilities in materials science.

    Area of Science:

    • Materials Science
    • Physics
    • Chemistry

    Background:

    • Atomic-scale imaging is crucial for understanding material properties.
    • Previous techniques had limitations in resolving single atoms.

    Purpose of the Study:

    • To demonstrate the capability of high-resolution scanning electron microscopy (HR-SEM) for single heavy atom imaging.
    • To establish a new standard for atomic resolution in microscopy.

    Main Methods:

    • Utilizing a high-resolution scanning electron microscope (HR-SEM).
    • Employing a thin carbon substrate for atom deposition.
    • Advanced image processing techniques to enhance visibility.

    Main Results:

    • Successfully obtained clear images of a single heavy atom.

    More Related Videos

    Compact Quantum Dots for Single-molecule Imaging
    17:14

    Compact Quantum Dots for Single-molecule Imaging

    Published on: October 9, 2012

    Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
    06:53

    Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

    Published on: July 27, 2018

    Related Experiment Videos

    Last Updated: Jun 28, 2026

    Single-Molecule Imaging of Nuclear Transport
    12:13

    Single-Molecule Imaging of Nuclear Transport

    Published on: June 10, 2010

    Compact Quantum Dots for Single-molecule Imaging
    17:14

    Compact Quantum Dots for Single-molecule Imaging

    Published on: October 9, 2012

    Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
    06:53

    Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

    Published on: July 27, 2018

  • Confirmed the atom's position and integrity on the substrate.
  • Demonstrated the effectiveness of HR-SEM at the atomic scale.

    • Conclusions:

    • High-resolution scanning electron microscopy is a viable tool for imaging individual heavy atoms.
    • This capability opens new avenues for atomic-level characterization and manipulation.
    • The findings push the boundaries of nanoscale imaging resolution.