PDF-RADIOACTIVE

2016 DANGEROUS GOODS CHECKLIST FOR A SHIPMENT The recommended checklist appearing on the following pages is intended to verify shipments at origin Never accept or refuse a shipment before all items h. Continuation of Journal Entry #5. Radiometric Dating. A technique used to date materials such as rocks based upon a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products using known rates of decay.. Section 6.4a. Law of Exponential Change. Suppose we are interested in a quantity . . . that . increases or. decreases at a rate proportional to the amount present…. Can you think of any examples???. Jim Hartnett. PHYS 3305. Radioactive Decay - Jim Hartnett. 1. What is it?. Macroscopic Effects. Types of Decay. The Decay Chain. Fission. Radioactive Decay - Jim Hartnett. 2. Radioactive Decay. A nucleus may be bound in a relatively high energy state, and if it can attain a lower energy, it will eventually do so. What we will learn about Fossils?. We will learn how fossils form?. What types of fossils exist?. How do scientists determine the age of fossils?. What do fossils reveal to scientists?. What is a fossil?. Transportation of Dangerous Goods . Class 7 – Shipping. Radiation Safety Office (Central Zone). QEII Bethune Building Room 244. 1276 South Park Street. Haifax. , Nova Scotia, B3H 2Y9 . CDHA -MS Clip Art File. Nuclear Stability . Nuclear stability . means that nucleus is stable meaning . that it . does not spontaneously emit any kind of radioactivity (radiation). . On the other hand, . if the . nucleus is unstable (not stable), it has the tendency of emitting some kind of . Reduction: Evaluating Alternative Technologies to Replace High Activity Radioactive Material. Presented by. Chris Boyd. Assistant Commissioner, Environmental Sciences & Engineering. NYC Department of Health and Mental Hygiene. some atoms are unstable. …occasionally emitting particles. from nucleus to become more stable. (radioactivity). this changes the atom. into a different type of . atom (parent element. decays to daughter element). 22.1 The Nucleus. New terms:. Nucleons- protons, neutrons and electrons. Nuclide- the atom. New symbols:. 228. 88. Ra . Superscript = atomic mass. Subscript= atomic #. Radium – 228. # is the atomic mass. When sedimentary rock is deposited in layers it is deposited horizontally.. Scientists use this “Principle of Original Horizontality” to help them determine the age of the layers.. The older layers of rock are found below the younger layers of rock.. Ray KoweNovember, London, United KingdomPage EF 6 Implementing Geological Disposal of Radioactive Waste Technology Platform IGDExchange ForumIGDTP Working Group on RD&D DisseminationRay Kowe, RWMGunna adioactivity is a part of nature Everyatoms are unstable that is they have toomuch energy When radioactive atoms spon-taneously release their extra energy they areeventually though they do not all dec What are they? . exposure … contamination. Are they the same?. Radioactivity. Spontaneous emission of radiation from the nucleus of an unstable isotope. Disintegration Decay. Demonstrate Decontamination. Where: . A . = Activity after some time t.. A. o. . = Original activity of the sample.. t . = Decay time . λ = the radioactive decay constant equal to . The half-life equation can be also used for activity, simply by replacing the number of atoms .