Radioactivity is natural. On earth it comes from rocks, but it also comes from space as cosmic rays. One of the sources of background radiation is radon.

Slides:

Advertisements

Similar presentations

Radon Radon is a heavy gas that is produced from the breakdown of uranium, which is present in soil, rock & water. It tends to collect in basements or.

Advertisements

LOJ Feb 2004 Radioactivity 3 Background radiation.

Radiation is All around Us Sunlight is electromagnetic radiation High-energy wavelengths above ultraviolet are collectively called “ionizing radiation”

Radon in Your Home Presenter information here 4/2014.

Radioactivity 1 輻射 Presented by Mr. Y. N. Chan LIU PO SHAN MEMORIAL COLLEGE.

Unstable Nuclei and Radioactive Decay Objectives: 9.0 Distinguish between chemical and nuclear reactions. 9.3 Identifying types of radiation and their.

IAEA Natural Terrestrial Radiation Day 3 – Lecture 7 Sources of Radiation 1.

When controlled, nuclear energy has many practical uses…

Mutants!.  The half-life of carbon-14 is 5730 years. Calculate how much of the original carbon- 14 would be left in a fossil that is years old.

Noadswood Science, Effects Of Alpha, Beta & Gamma Radiation On The Atom To understand the effect of alpha, beta and gamma radiation on the atom.

Learning Outcomes Historical outline of radioactivity: work of Becquerel (discovery of radiation from uranium salts); Marie and Pierre Curie (discovery.

Radiation. When you see or hear this word what do you think about? What do you think it means? Share your thoughts with me by writing on the post it what.

Radon Awareness Dr Julian MacDonald Radiation Protection Adviser Medical Physics Department.

RADON The Health Risks and Solutions. What is Radon? A naturally occurring radioactive gas. Colorless, odorless and tasteless. Found all over the U.S.

Radon Overview Introduction: Radon and Radon Exposure Health Effects.

Chapter 9 pages And Chapter 18 pages

Radioactivity. History Discovered (accidentally) ByHenri Becquerel “He carries thus his uranium salts under the sun, places them close to photographic.

DIFFERENTIATE BETWEEN FISSION AND FUSION.

Section 3 Nuclear Changes Section 3: Nuclear Radiation Today Preview Key Ideas Bellringer Where is Radiation? Beneficial Uses of Nuclear Radiation Risks.

L/O ;- To know what causes background radiation

Radioactivity Chapter 10 section 1 page

Section 3 Nuclear Changes Where is Radiation? 〉 We are continually exposed to radiation from natural sources, such as the sun, soil, rocks, and plants.

Developed by the Healthy Environments for Children Initiative at the University of Connecticut for the Connecticut Department of Public Health 2006 Measuring.

Chemical Reactions Involves the change of one or more substances into new substances Atoms are rearranged but their identities do NOT change The reaction.

Reading Assignment: pp

Notes 4-5 Radioactive Elements.

B: Radioactive Decay. There are about 350 isotopes of 90 elements found in our solar system. Of these, about 70 are radioactive. Naturally occurring radioisotopes.

NUCLEAR CHANGES CHAPTER 7

What is it to be Radioactive? Radioactive decay is the process in which an unstable atomic nucleus loses energy by emitting radiation in the form of particles.

NUCLEAR VS. CHEMICAL CHEMICAL reactions involve rearranging of atoms: e.g., H 2 +O 2  H 2 O No new atoms are created. Chemistry involves electrons only.

The Nucleus of the Atom Chapter 12 Great Idea: Nuclear energy depends on the conversion of mass into energy.

Lesson 1 What is radon?. Slide 1-1 Which characteristics apply to radon? Liquid Gas Solid Colorless Grayish-green Greenish-blue Smells like ozone Has.

Notes 4-5 Radioactive Elements. Isotopes Atoms with same number of protons but different numbers of neutrons Example: Carbon-12 (normal carbon) versus.

27/10/2015 GCSE Radiation 27/10/2015 Structure of the atom A hundred years ago people thought that the atom looked like a “plum pudding” – a sphere of.

Chapter 9 Nuclear Chemistry. What is nuclear chemistry? Nuclear chemistry is all about what happens in the nucleus of an atom. In nuclear chemistry, neutrons.

- Nuclear model of atom electron proton neutron. PARTICLECHARGE RELATIVE MASS -1 (NEGATIVE ) 1/2000 TH (NEGLIGIBLE) PROTON+1 (POSITIVE) 1 UNIT NEUTRON.

Radioactivity and radioisotopes The nature of radiation Distinguishing Radiation Background Radiation.

Radioactivity. Radiation When you see or hear this word what do you think about? What do you think it means? Share your thoughts with me by writing on.

Section 1Nuclear Changes Section 1: What is Radioactivity?

7.1 Nuclear Reactions What are atoms made of? Which particles are found in the nucleus? What are the three types of ionising radiation? What are the three.

 Background radiation: radiation we are exposed to all our lives  Most background radiation is naturally occurring arising from:  Sun & outer space.

Nuclear Chemistry: Half-Life. Half Life Definition = time it takes for half of a radioactive sample to decay; describes rate of decay The stability of.

Ch. 25 Nuclear Changes Begins on p. 35 of your PACKET.

Radioactivity Chapter 9 Nuclear Changes. Radioactivity  Radioactive materials have unstable nuclei.  They emit particles/energy to become stable. 

Atomic Theory, Isotopes, and Radioactive Decay PowerPoint 7.1.

Nuclear Chemistry Unit 10. Radioactivity The spontaneous emission of radiation by an unstable atomic nucleus. Discovery Henri Becquerel-1896 Worked with.

Background Radiation background radiation is caused by radioactive substances in rocks and soil and by cosmic rays. Some background radiation comes from.

Background Radiation Background radiation is radioactivity that is always present Background radiation is caused by radioactive substances in rocks and.

Indoor Air Quality in Tribal Communities Institute for Tribal Environmental Professionals nau.edu/iaqtc 1.

Atoms and Isotopes What are atoms, isotopes, and radioactive decay?

Atom’s Nucleus and Radioactivity 08 October 2015 Background Background Radioactivity and natural background exposure Radioactivity and natural background.

Radon Radioactive gas in your home? What is radon? Radon is radioactive Radon is radioactive It decays and emits an alpha particle It decays and emits.

P2 7.1 Nuclear reactions Some atoms have an unstable nucleus and need to get to a lower energy state. It can become stable by emitting Alpha, Beta or.

Nuclear Chemistry. The Atom The atom consists of two parts: 1. The nucleus which contains: 2. Orbiting electrons. protons neutrons.

Radiation Foldable Setup. Your Name radiation radioactive irradiated decay half life contamination.

Nuclear Decay. Radioactivity The emission of high-energy radiation or particles from the nucleus of a radioactive atom.

DETECTION OF NUCLEAR RADIATION

08/06/2016 GCSE Radiation W Richards Worthing High School.

** Radon is estimated to cause about 21,000 lung cancer deaths per year, according to EPA's 2003 Assessment of Risks from Radon in Homes (EPA 402-R ).EPA's.

When the repulsive forces of the protons exceeds the ability of the strong nuclear force to hold them together, they are unstable. In addition, sometimes.

John Preston Structure of the Atom p np n Nucleus.

Nuclear Radiation Today Chapter 10.3 Notes. Where is radiation? Radiation is everywhere—the form of nuclear radiation that occurs naturally is called.

Radioactive Decay and Half Life of Isotopes. Radioactive decay Alpha, Beta and Gamma.

The ABG's (or Alpha, Beta, Gamma) of Radioactivity

RADON Seamus Doyle Health & Safety Manager.

Nuclear Chemistry Nuclear chemistry is the study of the properties and reactions of atomic nuclei. Radioactivity- the spontaneous emission of radiation.

What can we do to protect ourselves from radiation?

25.3 – Detecting Radioactivity

Presentation transcript:

Radioactivity is natural. On earth it comes from rocks, but it also comes from space as cosmic rays. One of the sources of background radiation is radon gas from uranium in the ground. The two most common types of radon are radon-222 and radon-220. concentrations vary dramatically around the world.

New buildings in high radon areas are built with vented floors. When particularly high concentrations exist, extractor fans are fitted to draw out the gas before it can pass into the home. Another way of reducing radon levels is to use more impenetrable damp proof membranes on the ground floor.]

Radon-220 has a half life of 55.6 seconds. This means it is unlikely to be at risk as it decays before it has a chance to enter buildings. But radon-222 has a half life of just under 4 days. This means it has time to enter buildings. There are a total of 8 decays from radon-222 until a stable isotope is reached. Half are alpha emissions and half are beta. The emission of alpha or beta particles inside the lungs can lead to lung cancer. Around 5% of the 34,000 uk deaths each year from Lung cancer are attributed to radon.

Maps