Home
Looking for Previous Year IAS Papers? Download now free!
You will be auto-sent a link to download the IAS Past Papers & Model Papers when you join the IAS Free Training Group

Home | Downloads | Careers | Books |IAS Online TutorialsIAS online Tutorials | Advertise Advertise| Contact Us | About Us | ForumForum| Link to usLink to us
Login Tuesday, April 23, 2024

IAS Resources
About IAS
IAS Preparation
IAS Careers
IAS Syllabus
IAS Online Tutorials
IAS Free Online Exam
Indian Forest Service
Indian Engineering Service
Indian Foreign Service
Indian Police Service
Record and Opinion
Books and Links
Free Downloads
Miscellaneous


 Home » Tutorials » Chemistry » General Chemistry » Radioactivity

Radioactivity


A D V E R T I S E M E N T
>


Radioactive Emissions



Nuclei undergoing nuclear decay release various kinds of emissions. We will discuss three of these emissions: alpha particles, beta particles, and gamma rays.

(more content follows the advertisement below)
A D V E R T I S E M E N T


All three are forms of ionizing radiation, so called because their passage through matter leaves a trail of ions and molecular debris.

Alpha particles



An alpha particle is identical to a helium atom that has been stripped of its two electrons; thus, an alpha particle contains two protons and two neutrons. Because an alpha particle has no electrons to balance the positive charge of the two protons, it has a charge of +2 and can be represented as He2+. If a particle has a charge, whether negative or positive, it can be shown as a superscript. Thus He2+ means a helium atom that has lost two electrons and has a +2 charge. The symbol O2- means an oxygen atom that has added two electrons and thus has a charge of -2. Atoms that have acquired a charge by losing or gaining electrons are called ions. Besides He2+, other symbols for this particle are

Helium Equation

When ejected from a decaying nucleus, alpha particles interact with all matter in their path, whether it be photographic film, lead shielding, or body tissue, stripping electrons from other atoms as they go. In their wake, they leave a trail of positive ions (atoms from which electrons have been removed) and free electrons. A single alpha particle, ejected at high speed from a nucleus, can create up to 100,000 ions along its path before it gains two electrons to become a neutral helium atom. In air, an alpha particle travels about 4 cm before gaining the two electrons. Within body tissue, its average path is only a few thousandths of a centimeter. An alpha particle is unable to penetrate the outer layer of human skin. Because of this limited penetrating power, external exposure to alpha particles is not nearly as serious as internal exposure. If a source of alpha emissions is taken internally, the alpha radiation can do massive damage to the surrounding tissue; therefore alpha emitters are never used in nuclear medicine.







Discussion Center

Discuss

Query

Feedback/ Suggestion

Yahoo Groups

Sirfdosti Groups

Contact Us




Members Login Here!
EmailId:
Password:


Forgot Password?
New User? Register!
Toppers View



INTERVIEW EBOOK
Get 9,000+ Interview Questions & Answers in an eBook. Interview Question & Answer Guide
  • 9,000+ Interview Questions
  • All Questions Answered
  • 5 FREE Bonuses
  • Free Upgrades

IAS PREPARATION EBOOKS

IAS Exam, IAS 2024, IAS 2025 Training, IAS 2023 Papers and Solutions, IAS Preparation & Related Pages


IAS Forum | Civil Services | IAS Overview | How to Prepare for IAS | IAS Eligibility Criteria | IAS Exam Pattern | IAS Exam Syllabus | IAS Application Form Centers | Sections Under IAS Examinations | Postings of an IAS Officer | Method of Making Notes | Style of Answering Questions | Time Management | IAS Regulations | Cut off Marks in IAS | Training Institutes for IAS | IAS Tips | Time Table for IAS 2024 Exam | Calendar for IAS 2024 Exam | Top Scorers in IAS Exam | Post Offices for IAS Exam Form | Sample IAS Exam Paper | IAS Current Affairs | Career in IAS | Jobs Offered in IAS | Nature of Work | Interview Tips for IAS | Interview Techniques for IAS | IAS Syllabus | IAS Preparation Strategy | IAS Model Notification | Daily / Periodicals for IAS | Art and Craft | IAS Tutorials | IAS Tutorials for Agriculture | IAS Tutorials for Animal Husbandry & Veterinary Science | IAS Tutorials for Botany | IAS Tutorials for Chemistry | IAS Tutorials for Economics | IAS Tutorials for Essay | IAS Tutorials for Geography | IAS Tutorials for Geology | IAS Tutorials for Indian History | IAS Tutorials for Physics | IAS Tutorials for Psychology | IAS Tutorials for Sociology | IAS Tutorials for Zoology | Previous Years Test Papers for IAS | IAS Mock Exam | Current Affairs for IAS | IFS - Indian Forest Services | IFS - Indian Forest Services Examination Plan | IFS - Indian Forest Services General Instructions | IFS - Indian Forest Services - List of Head Post Offices | IFS - Indian Forest Services Special Instructions | IES - Indian Engineering Service | IES - Indian Engineering Service Model Notification | IES - Indian Engineering Service General Instructions | IES - Indian Engineering Service Examination Plan | IFS - Indian Foreign Service | IFS - Indian Foreign Service - Selection & Training | Career in IFS - Indian Foreign Service | IPS - Indian Police Service - Modern Ranks and Rank Badges | IPS - Indian Police Service in History | IPS - Indian Police Service - External Resources | Reward of Brilliance | Deputation | Civil Lines | IAS Toppers Opinion | Renumeration in IAS | AKHAND PRATAP SINGH - IAS Topper | Anay Dwivedi - IAS Topper | Anupama - IAS Topper | D DIVYA - IAS Topper | Divyadharshini - IAS Topper | Divyadharshini Shanmugam - IAS Topper | Dr Sumit Seth - IAS Topper | GAGAN - IAS Topper | Garima Mittal - IAS Topper | GARIMA MITTAL - IAS Topper | Iqbal Dhalibal - IAS Topper | Iva Sahay - IAS Topper | JAI PRAKASH MAURYA - IAS Topper | Karthik Adapa - IAS Topper | Mangesh Kumar - IAS Topper | Manish Ranjan - IAS Topper | Muthyala Raju Revu - IAS Topper | Nila Mohan - IAS Topper | Pankaj Dwivedi - IAS Topper | PC Vinoj Kumar - IAS Topper | Prasad Praladh Akkanouru - IAS Topper | Prince Dhawan - IAS Topper | R V Varun Kumar - IAS Topper | RAVI DHAWAN - IAS Topper | Roopa Mishra - IAS Topper | Rukmani Riar - IAS Topper | Saswati Dey - IAS Topper | SASWATI DEY - IAS Topper | Shah faesal - IAS Topper | Shena Agrawal - IAS Topper | Sorabh Babu Maheshwari - IAS Topper | Sweta Mohanty - IAS Topper | TANVI SUNDRIYAL - IAS Topper | Vijayalakshmi Bidari - IAS Topper | IAS Books | SSC Exam Pattern | CDSC Exam Pattern | NDA Exam Pattern | GA - General Awareness Exam Pattern | PG - Post Graduate Exam Pattern |
Copyright © 2024. One Stop IAS.com. All rights reserved Privacy Policies | Terms and Conditions | About Us
Our Portals : Free eBooks | Interview Questions | IndiaJobForum | Free Classifieds | Vyoms | One Stop FAQs | One Stop GATE | One Stop GRE | One Stop IAS | One Stop MBA | Free SAP Training | One Stop Testing | Web Hosting | Sirf Dosti | Your Project Code | Cook Book Global | Tests World | Clean Jokes | Vyom | Vyom eBooks | Vyom Links | Vyom World | Shayari | C Interview Questions | C++ Interview Questions | Send Free SMS | Placement Papers | SMS Jokes | CAT 2024 Notification