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nucleon

C2
noun

Pronunciation

UK

  • /njˈuːklɪən/

US

  • /nˈuːklɪən/

Description

At the center of an atom is the nucleus, and inside that center are particles called nucleons. A proton is one kind, and a neutron is the other. These particles make up the main mass of an atom and play a key role in what an atom is like.

Scientists study nucleons to understand atomic structure and nuclear physics. You probably will not hear this word in daily conversation, but it is very important in science when people talk about the inside of atoms.

Examples

  1. 1

    Particle types

    A proton is one kind of nucleon, and a neutron is the other.

  2. 2

    Atomic nucleus

    The paper describes how a nucleon behaves inside a dense atomic nucleus.

  3. 3

    Collision energy

    Physicists often report the collision energy in gigaelectronvolts per nucleon.

    • Phrase

      per nucleon

      for each nucleon, not for the whole atom or ion

Forms and spellings

1 form open this card.

Main spelling

  • nucleonnoun