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
SearchCompliance
  • OPSEC (operations security)

    OPSEC (operations security) is a security and risk management process and strategy that classifies information, then determines ...

  • smart contract

    A smart contract is a decentralized application that executes business logic in response to events.

  • compliance risk

    Compliance risk is an organization's potential exposure to legal penalties, financial forfeiture and material loss, resulting ...

SearchSecurity
  • What is cybersecurity?

    Cybersecurity is the protection of internet-connected systems such as hardware, software and data from cyberthreats.

  • private key

    A private key, also known as a secret key, is a variable in cryptography that is used with an algorithm to encrypt and decrypt ...

  • DOS (disk operating system)

    A DOS, or disk operating system, is an operating system that runs from a disk drive. The term can also refer to a particular ...

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • change control

    Change control is a systematic approach to managing all changes made to a product or system.

  • disaster recovery (DR)

    Disaster recovery (DR) is an organization's ability to respond to and recover from an event that affects business operations.

SearchStorage
  • NOR flash memory

    NOR flash memory is one of two types of non-volatile storage technologies.

  • What is RAID 6?

    RAID 6, also known as double-parity RAID, uses two parity stripes on each disk. It allows for two disk failures within the RAID ...

  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

Close