A subatomic particle is a particle that is smaller than an atom. These particles are the building blocks of matter and are categorized into several types based on their properties and roles in the structure of atoms.
Here are some of the most common subatomic particles:
- Electron: Electrons are negatively charged subatomic particles found outside the atomic nucleus in electron shells. They are responsible for chemical bonding and electricity.
- Proton: Protons are positively charged subatomic particles located in the nucleus of an atom. They determine the element’s identity and contribute to the positive charge of the nucleus.
- Neutron: Neutrons are neutral subatomic particles also found in the nucleus of an atom. They help stabilize the nucleus and contribute to its mass.
- Quarks: Quarks are elementary particles that combine to form protons and neutrons. There are six types, or “flavors,” of quarks: up, down, strange, charm, bottom, and top.
- Photon: Photons are massless, neutral particles of light and electromagnetic radiation. They are carriers of the electromagnetic force and have both particle and wave-like properties.
- Muon: Muons are similar to electrons but are more massive. They are unstable and decay into other particles.
- Tau: Tau particles are even more massive than muons and are also unstable, decaying into other particles.
- Bosons: Bosons are a class of subatomic particles that are associated with fundamental forces. For example, the photon is a boson associated with the electromagnetic force. The Higgs boson is associated with the Higgs field, responsible for giving particles mass.
- Leptons: Leptons are a group of elementary particles that includes electrons, muons, and taus. They do not experience strong nuclear forces and are not composed of quarks.
- Hadrons: Hadrons are particles composed of quarks, and they are divided into two categories: baryons (e.g., protons and neutrons) and mesons (e.g., pions).
- Antiparticles: For every subatomic particle, there exists an antiparticle with the same mass but opposite charge. When particles and their corresponding antiparticles meet, they annihilate each other.
These subatomic particles are the subject of study in the field of particle physics, which seeks to understand the fundamental constituents of matter and the forces that govern their interactions. The behavior of these particles is described by the principles of quantum mechanics and the Standard Model of particle physics. They play a crucial role in shaping the properties and behavior of matter in the universe.
Key terms in plain language
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Cybersecurity
The practices and controls used to protect identities, devices, networks, applications, and data from unauthorized access, disruption, or manipulation.
Zero Trust
A security model that does not automatically trust a user or device because of its location. Access is continuously verified and limited to what is necessary.
SASE
Secure Access Service Edge combines networking and security capabilities in a cloud-delivered architecture so users and locations can receive consistent policy wherever they connect.
Identity and Access Management (IAM)
The systems and policies that determine who a user is, what resources they may access, and how that access is authenticated and reviewed.
Multi-Factor Authentication (MFA)
A login control requiring more than one form of verification, such as a password plus an authenticator app, security key, or biometric factor.
MDR / XDR
Security services and tools that monitor activity, investigate suspicious behavior, and help contain threats. MDR is managed detection and response; XDR correlates signals across multiple security layers.