Browse Definitions :
Definition

proton

A proton is a subatomic particle found in the nucleus of every atom.  The particle has a positive electrical charge, equal and opposite to that of the electron. If isolated, a single proton would have a mass of only 1.673 ? 10-27 kilogram, just slightly less than the mass of a neutron.

The number of protons in an element's nucleus is called the atomic number.  This number gives each element its unique identity.  In the atoms of any particular element, the number of protons in the nuclei is always the same.  An atom of simple hydrogen has a nucleus consisting of a single proton all by itself.  The nuclei of all other elements nearly always contain neutrons in addition to protons.

Protons need not be confined to the nuclei of atoms.  When protons are found outside atomic nuclei, they acquire fascinating, bizarre, and potentially dangerous properties, similar to those of neutrons in similar circumstances.  But protons have an additional property. Because they carry an electric charge, they can be accelerated by electric and/or magnetic fields.  High-speed protons, and atomic nuclei containing them, are emitted in large numbers during solar flares.  The particles are accelerated by the earth's magnetic field, causing ionospheric disturbances known as geomagnetic storms.

This was last updated in May 2008

Join the conversation

3 comments

Send me notifications when other members comment.

Please create a username to comment.

That is so great, it's very helpful in my true life, and I love your answer for science, great job!
Cancel
Thank you!
Cancel
I like this website. It gives such good definitions.
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • compliance audit

    A compliance audit is a comprehensive review of an organization's adherence to regulatory guidelines.

  • regulatory compliance

    Regulatory compliance is an organization's adherence to laws, regulations, guidelines and specifications relevant to its business...

  • Whistleblower Protection Act

    The Whistleblower Protection Act of 1989 is a law that protects federal government employees in the United States from ...

SearchSecurity

  • RSA algorithm (Rivest-Shamir-Adleman)

    The RSA algorithm is the basis of a cryptosystem -- a suite of cryptographic algorithms that are used for specific security ...

  • remote access

    Remote access is the ability to access a computer or a network remotely through a network connection.

  • IP Spoofing

    IP spoofing is the crafting of Internet Protocol (IP) packets with a source IP address that has been modified to impersonate ...

SearchHealthIT

SearchDisasterRecovery

  • network disaster recovery plan

    A network disaster recovery plan is a set of procedures designed to prepare an organization to respond to an interruption of ...

  • virtual disaster recovery

    Virtual disaster recovery is a type of DR that typically involves replication and allows a user to fail over to virtualized ...

  • tabletop exercise (TTX)

    A tabletop exercise (TTX) is a disaster preparedness activity that takes participants through the process of dealing with a ...

SearchStorage

  • enterprise storage

    Enterprise storage is a centralized repository for business information that provides common data management, protection and data...

  • disk array

    A disk array, also called a storage array, is a data storage system used for block-based storage, file-based storage or object ...

  • optical storage

    Optical storage is any storage type in which data is written and read with a laser. Typically, data is written to optical media, ...

Close