Topic: Sub Atomic Particles: Overview, Types & Significance

Submitted By:

Name: D.Sairam ( 1st Sem IBT)

Teacher: Dr. Vineet Sharma

Course Code: BSBT-102 ( Chemistry for

Biologists)

Assignment Code: U2P1

Source: www.britannia.com/images

Overview

• Introduction

• Types of Sub-Atomic Particles

• Quarks

• Leptons

• Bosons

• Significance

Introduction

• Subatomic particles are particles that are smaller than

atoms. They are present within an atom and cannot be

seen by our naked eyes.

• They have their own distinct characters and are

mainly of two types of Elementary Particles and

Composite Particles.

• Protons and neutrons are Composite Particles while

Electron is an Elementary Particle.

Source: Google Images/sub_atomic particles

Elementary Particles

Colour Confinement

Hadrons

Types

QUARKS

Source: Google Images/Quarks

Quarks can be observed

in Hadrons such as

Baryons i.e. in particles

such as Protons and

Neutrons.

Murray Gell-Mann (Right) and

George Zweig

Source: a) Google Images

b) www.sciencedaily.com/Quarks

Elementary

Types

Electron

Generations

Not subjected

to strong

Interactions like

Quarks

Leptons

Sources:

www.google.com/images

This is Positronium ,a system that combines Electron with it’s anti particle

Positron. It ( system) is highly unstable as the duo react to give two 2 Gamma

particles. It's lifespan is around 125 picoseconds.

Source:

www.wikipedia.org/positro

nium

Either Elementary or

Composite

Types of Elementary

Bosons

a) Scalar or Zero Spin –

Higgs Boson

b) Gauge or Force-

Gluon, Photon and W

and Z Boson.

Composite: Meson

Graviton ( Hypothetical

so far)

Bosons

Source: www.google.com/images

Source: www.google.com/images

Significance of Sub Atomic Particles

• They are produced in cosmic rays and during scattering

processes in particle accelerators.

• Electron, arguably the most important Sub-Atomic Particle

helps in studying and identifying Chemical Properties of

Elements.

• Proton Therapy is a type of treatment that can be used to treat

Cancers.

• Elimination or Turning off the Higgs Field can result in rapid

Communications and Transmission of Signals.

• Positron is used in PET scan that treat many ailments and

maladies.

• Most of the Gauge Bosons are used in Super fluidity.

References

http://profmattstrassler.com/articles-and-posts/particle-physics-basics/the-

known-apparently-elementary-particles/tau-leptons/

http://www.sciencedirect.com/science/article/pii/0375947481903043

http://www.scienceclarified.com/sp-th/subatomic-particles.html

http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/atomic_structu

re/atomic_structurerev2.shtml

http://chemwiki.ucdavis.edu/Physical_Chemistry/Atomic_Theory/The_Ato

m/Sub-Atomic_Particles

http://en.wikipedia.org/wiki/Subatomic_particle

http://search.yahoo.com/yhs/search?hspart=ddc&hsimp=yhs-

ddc_bd&p=composite%20bosons&type=999_sca0__alt__ddc_dss_bd_com

http://www.britannica.com/gallery/browse

http://www.azonano.com/news.aspx?newsid=12677