PPT-The Atomic Nucleus & Radioactive

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. 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. 1.c. – Students know how to use the periodic table to identify alkali metals, alkaline earth metals and transition metals, trends in ionization energy, electronegativity, and the relative sizes of ions and atoms.. 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 . Review & Introduction for Science 10. Vocabulary. ATOM. :. smallest particle of an element, has a neutral charge.. ELEMENT. :. made up of 1 type of atom (. eg. . Oxygen, . O. ). COMPOUND:. . a pure substance made up of 2 or more elements that are . In the nuclear equation for alpha decay, the mass number of the new nucleus decreases by 4 and its atomic number decreases by 2.. Learning Goal . Write a balanced nuclear equation showing mass numbers and atomic numbers for radioactive decay.. Chapter 3. Types of Models – Why do we use models?. Physical Model vs. Conceptual Model. Physical model. is a representation of a very large or small object shown at a convenient scale. . 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 . 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. Radiation. . A high-speed electron ejected from a nucleus during radioactive decay is called a (an). A) alpha particle.. B) beta particle.. C) gamma ray.. D) none of the above are correct.. . The ejection of an alpha particle from a nucleus results in:. A person working with radioisotopes wears protective clothing and gloves and stands behind a shield.. 2. Radioactive Isotopes. A . radioactive isotope . has an unstable nucleus. emits radiation to become more stable. Following the discovery of radioactivity by Henri Becquerel in 1896, many scientists were keen to find out more about it and understand where it came from.. In a radioactive atom, the nucleus is unstable and so it emits particles or waves of radiation to form a more stable atom. . A naturally . radioactive element . will . emit . energy without the absorption of energy from an outside source. . The nucleus of an element becomes radioactive because of an unstable ratio of protons to neutrons in the nucleus.. 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. . . Stability of Isotopes. Transmutation. June 8-10, 2020. The ratio of neutrons to protons in the nucleus determines the stability of a specific nucleus. . Too many neutrons = unstable. If any element has an unstable isotope, it is radioactive and called a radioisotope. .