PPT-The Structure of the Nucleus

Rutherford uncovered the first nuclear building block A beam of alpha particles scattered off nitrogen gas A new particle emerged that was positively charged like the alpha particles but behaved more like the hydrogen nuclei previously observed in other experiments. (5 marks). (b) When gold foil is bombarded by alpha particles it is found that most of the particles pass through the foil without significant change of direction or loss of energy. A few particles are deviated from their original direction by more than 90°. Explain, in terms of the nuclear model of the atom and by considering the nature of the forces acting,. OCR AS Biology. Unit 1: Cells, Exchange and Transport. Learning objectives. To understand and discuss the basis of cell theory based upon milestones in cell biology. To carry out practical work on cell size and magnifications using a light microscope. and . Analyzing Networks. Scott Kirkpatrick. Hebrew University of Jerusalem. April 12, 2011. Sources of data. Communications networks. Web links – . urls. contained within surface pages. Internet Physical network. On your bell work . sheet, answer the following.. When . are zeros significant? . . When . do you use the fewest number of Significant Figures?. Objectives. The Structure of the Atom. Properties of Subatomic Particles. Kelly . Bushouse. , Cap Kelly, and Connor O’Neill. What is the nucleus?. . The nucleus is the control center of the cell.. Hereditary information is stored as DNA and RNA in the nucleus.. The nucleus controls reproduction, movement, eating, and more.. Textbook Pages 4-5. Lesson Objectives. Appreciate that there are various models to illustrate atomic structure. Know that early models of atomic structure predicted that atoms and ions with noble gas electron arrangements should be stable. . Cell Structure. Enormous variety in the size and shape of different cells. Smallest cells belong to group of . organisms. . Mycoplasma. Only about 0.2 µm in diameter. So small that often beyond the limit of resolution of light microscopes. Katie Thompson. History of Nucleus. In 1911 Earnest . R. utherford discovered a nucleus in an atom. Experimented by shooting X-rays that contained positively charged alpha particles at gold foil. The X-rays were shot through the middle of an atom and bounced back demonstrating a densely populated area of other positive particles. By. Dan Intartaglio &. Joel Skivington. History. Robert Brown. 1773-1858. -Discovered in 1831 by Scottish botanist Robert Brown. -Suggested . the nucleus played a key role in fertilization and development of the embryo in plants. Matter describes anything that has . mass. and . volume. Can matter be invisible? . YES. Ex. . Air. Matter and Atoms. History of atoms. Democritus. Was a . Greek. philosopher in . 400 BC. Thought the universe was made of . Structure. Main component is phospholipids that are arranged in a double layer (. bilayer. ). Has scattered proteins within the phospholipids. Regulate what enters/leaves cell. Function . Nucleus. Structure. Extended Learning — Activities and Projects1.Visit a laboratory for senior secondary students in your school orin a neighbouring school. Learn about the functioning of aunder the microscope.2.Tal Atom structure. 1. 2. 3. What is the radius of an atom?. What is the radius of a nucleus?. 1x10. -10. m. 1x10. -15. m. Atom structure. An isotope is an element with a different number of neutrons. Isotope. Structure: pancreatic acinar cells. Identification: nucleus, nucleolus, heterochromatin. Heterochromatin. Nucleus. Nucleolus. Pancreas . 158. Pancreas . 158. 32409. Nuclei with . nucleoli. 32409.