PPT-Discussion question: If a nucleus undergoes radioactive de

True False Types of radioactive decay Gamma Beta ec Alpha Neutron emission Fission Fusion httpielblgoveducationisotopeshtm Gamma Decay Nucleus in excited state gives off energy as a photon. Radioactivity. Science Park HS -- Honors Chemistry. Early Pioneers in Radioactivity. Roentgen:. Discoverer of X-rays 1895. Becquerel:. Discoverer of Radioactivity 1896. The Curies:. Discoverers of Radium and Polonium 1900-1908. Fourth lecture. Discovery of radio activity. Radioactivity was the first nuclear phenomenon to be discovered , the credit for this discovery goes to the French physicist Henri Becquerel (1896) .. Radioactivity . For . B.Sc. Chemistry (General), Part- I. By. Dr. . Kakoli. . Banerjee. Department of Chemistry. Aims and Objectives. Definition of Radioactivity . Discovery of Radioactivity- The Pioneers. Cause of Radioactivity- Nuclear Instability. . Chemistry. How does a nuclear reactor work?. http://www.lanl.gov/science/1663/images/reactor.jpg. How does a small mass contained in this bomb cause……. Nuclear Bomb of 1945 known as . “. fat man. 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 . T . and the half-life of Y is 3. T. . After a time of 3. T . the . ratio . of the amounts of X to Y is. A. . 8. .. B. . 4. .. C. . 1/4.. D. . 1/8.. . The process by which a heavy nucleus splits into two lighter nuclei is known . Nuclear Power Plant in . Richland, WA. Review From . Friday. ’s . Lesson. The Band of Stability. Certain isotopes are more stable than others. The ratio of protons to neutrons is important in determining stability. 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. Chart of the Nuclides. General Layout. Each nuclide occupies a square in a grid where. Atomic number (Z) is plotted vertically. Number of neutrons (N) is plotted horizontally. Heavily bordered square at left side of each row gives. 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.. Section 21.1 Types of Radioactivity. Objectives: Analyze Common Sources of Background Radiation, Compare and Contrast Alpha, Beta and Gamma Radiation, Apply the concept of Half-Life of a Radioactive Element. College of Pharmacy – . Karary. University. Department of Pharmaceutical Chemistry. Radiopharmaceuticals. . I can:. -recognize the meaning of radioactive. . -recognize . that through radioactive decay, the unstable nucleus emits radiation in the form of very fast-moving particles and energy to produce a new nucleus, thus changing the identity of the element and nuclei that undergo this process are said to be radioactive. . Dosimetry. Half-life and Safety. Nuclear Reactors. Radioactivity. Intermediate 2 Physics. Ionising Radiations. Dosimetry. Half-life and Safety. Nuclear Reactors. Radioactivity. The atom is made of three main components:.