PDF-1 What Is Radioactive MaterialFigure 1 The Atom

adioactivity is a part of nature Everyatoms are unstable that is they have toomuch energy When radioactive atoms spontaneously release their extra energy they areeventually though they do not all dec. weathering, . erosian. .. Continents:. Mountain Formation and Erosion:. Sedimentary rocks. Rocks:. Dating Rocks. Relative - Absolute. Nicolai . Stenonis. (1638-1686).. . "...at the time when any given stratum was being formed, all the matter resting upon it was fluid, and, therefore, at the time when the lower stratum was being formed, none of the upper strata existed.” . Atomos: Not to Be Cut. The History of . the Atom and the Atomic . Theory. Atomic Models. This model of the atom may look familiar to you. This is . the Bohr model. . In this model, the nucleus is orbited by electrons, which are in different energy levels. . Problems and Trends of Development. (Georgian case). Giorgi. . Nabakhtiani. Georgian-German Science Bridge, Workshop 6-12July, Tbilisi, Georgia. (IAEA definitions). Radioactive waste:. Radioactive material for which no further use is foreseen. What is Radioactive Decay?. What is Radioactive Dating?. How do Scientists Determine Earth’s Age?. 93.75%. 6.25%. What is Radioactive Dating?. . DE 1:24 . 1. 3.9 billion years. 2. 22, 920 years. What are the 3 major parts of an atom?. Proton . Neutron . Electron. Parts of an Atom. Another Model. SIMPLIFIED MODEL.. PROTON. Protons are positively charged particles found in the atomic nucleus. . Decay. (Chapter 10. ). Student Learning . Outcomes. Analyze . radioactive decay and its . results. D. ifferentiate . between nuclear fission and . fusion. Is Radiation Dangerous?. Major Constituents of an Atom. 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.. Unscramble the following keywords for today’s lesson:. . Yecad. Iriaovadect. Ootspei. Nsteruon. nadgit. Isotopes . When the nucleus of an atom possesses either too many or too few neutrons compared to the number of protons it becomes unstable. These are called radioactive isotopes. Unstable nuclei split up in a process called radioactive decay and emit radioactive radiation.. What number equals the number of protons?. Atomic Number. From the periodic table – . How is the mass of a “regular” (most abundant) atom determined?. Protons Neutrons = Atomic Mass. An Isotope is defined as…. 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 IONIZING RADIATION x0000x0000Division of Toxicology September 1999 x/MCIxD 2 x/MCIxD 2 Radiation doses from procedures used by licensed physicians in diagnosis and treatment of disease is not limited 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. Commenwealth. of Massachusetts (Radiation Control Program), as specified by 105 CMR 120. . http://www.mass.gov/dph/rcp/radia.htm. . Copies of the license, active amendments, and relevant correspondence are maintained in the office of Clark’s Radiation Safety Officer, Dr. David L. Thurlow, . Rutherford proposed that most of the mass of the atom was concentrated. . at the atom’s center. . Rutherford’s Model of the Atom. Rutherford’s experiment suggested that an atom’s positive charge is concentrated in the center of the atom .