Nuclear Chemistry Ch. 21. Radioactive Emissions Alpha decay – He nucleus What product is formed when radium-226 undergoes alpha decay? What element undergoes.

Slides:

Advertisements

Similar presentations

CHAPTER 22 Nuclear Chemistry

Advertisements

Radioactive Decay. - Alpha Decay The emission of an particle from the nucleus of an atom is called alpha decay An alpha particle is just a helium nucleus.

Chapter 22 – Nuclear Chemistry

IV. Isotopes 2 or more atoms of the same element having the same number of protons BUT different numbers of neutrons.

The Atomic Nucleus and Radioactivity The nucleus is composed of particles called nucleons, which are protons and neutrons. The number of nucleons is called.

LOJ Feb 2004 Radioactivity 1 What is radioactive decay?

Nuclear Chemistry & Radioactive Decay. Nuclear Chemistry Defined Changes occurring WITHIN the nucleus of an atom Atomic nuclei often emit particles or.

Radioactive Decay Radioactive Decay. Radioactive Decay: Some unstable atoms try to regain stability by losing energy. They lose energy by emitting radiation.

Nuclear Energy. Nuclear energy is all around us and can be used for medical purposes. Nuclear energy is when an atom is split and releases energy or particles.

Radioactive Decay Calculations

Modern Physics Radioactive Decay. Look at the periodic table given to you. Find element with the atomic number 6 What is it?

1 Nuclear Radiation Natural Radioactivity Nuclear Equations Producing Radioactive Isotopes Half-Life Nuclear Fission and Fusion.

Reading Assignment: pp

Nuclear Chemistry Chemistry Ms.Piela.

Alpha Decay. Radioactive Decay Alpha Decay Radioactive Decay Alpha Decay Beta Decay.

Chapter 25 Review Solutions. Which of the following particles cannot be stopped by metal foil? a. Alphab. Betac. Gamma.

Nuclear Chemistry. Hiroshima Nagasaki Nuclear Fission : splitting of the atom into different parts.

What is it to be Radioactive? Radioactive decay is the process in which an unstable atomic nucleus loses energy by emitting radiation in the form of particles.

THE NUCLEUS: A CHEMIST’S VIEW. Nuclear Symbols Element symbol Mass number, A (p + + n o ) Atomic number, Z (number of p + )

4.4 Unstable Nuclei and Radioactive Decay Radioactive decay In the late 1890s, scientists noticed some substances spontaneously emitted radiation, a.

Nuclear Chemistry “Bravo” Test 1954 – 15,000 kilotons.

Nuclear Chemistry “Bravo” Test 1954 – 15,000 kilotons.

Chapter 9 Nuclear Radiation

Chapter 9 Nuclear Chemistry. What is nuclear chemistry? Nuclear chemistry is all about what happens in the nucleus of an atom. In nuclear chemistry, neutrons.

 Chemical Properties  Determined by ▪ number of electrons ▪ positions of electrons.

Nuclear Chemistry Chapter 21.

Basic Nuclear Chemistry. Line vs. Continuous Spectra.

CHAPTER 21 NUCLEAR CHEMISTRY. NUCLEUS NUCLEONS ARE MADE UP OF PROTONS AND NEUTRONS NUCLIDE IS AN ATOM IDENTIFIED BY THE NUMBER OF PROTONS AND NEUTRONS.

Radioactivity and radioisotopes The nature of radiation Distinguishing Radiation Background Radiation.

Radioisotopes The nuclei of some atoms are unstable and undergo spontaneous changes called radioactive decay. One such change is called beta decay. During.

Radioactive Decay Read pages THE STRONG NUCLEAR FORCE STRONG NUCLEAR FORCE Atoms are held together by.

Chapter 15 Nuclear Radiation

Nuclear Chemistry Chapter 23 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Nuclear Chemistry The Guide to types of Radioactive Decay and their Properties.

Chapter 5 Notes.  The atomic mass of an element is a weighted average mass of the atoms found in nature.  If you were to mass an oxygen atom, would.

Section 19.1 Radioactivity 1.To learn the types of radioactive decay 2.To learn to write nuclear equations for radioactive decay 3.To learn how one element.

Radioactive Decay Series Worksheet Init 5/11/2012 by Daniel R. Barnes based on a years-old worksheet U  mass number = # of protons + # of neutrons.

C. Johannesson CHAPTER 22 Nuclear Chemistry II. Radioactive Decay (p ) II. Radioactive Decay (p ) I IV III II.

Radioactive Decay Quick Review Atom made of 3 subatomic particles Protons (positive, inside nucleus) Protons (positive, inside nucleus) Electrons (negative,

Some elements have atoms which are unstable. These atoms spontaneously transmutate from one element to another. These types of transmutations include.

Radioactive Decay.

The Structure of the Atom Radioactivity. –Spontaneous emission of radiation by certain atoms –The structure of atomic nuclei and the changes they undergo.

Nuclear Transformations Objectives: 1. What determines the type of decay a radioisotope undergoes? 2. How much of a sample of a radioisotope remains after.

General, Organic, and Biological Chemistry Fourth Edition Karen Timberlake 4.2 Nuclear Reactions Chapter 4 Nuclear Chemistry © 2013 Pearson Education,

Atomic Theory, Isotopes, and Radioactive Decay PowerPoint 7.1.

By: Joy Mihanni And Jonathan Samuels

Atoms and Isotopes What are atoms, isotopes, and radioactive decay?

Types of Radioactive Decay Kinetics of Decay Nuclear Transmutations

Thursday, October 15 th, 2015 The ABG's (or Alpha, Beta, Gamma) of Radioactivity.

Chapter 21 Section 2 Radioactive Decay Radioactive Decay.

NUCLEAR CHANGES What is Radioactivity?. What happens when an element undergoes radioactive decay? During radioactive decay an unstable nuclei of an isotope.

Nuclear Decay. Radioactivity The emission of high-energy radiation or particles from the nucleus of a radioactive atom.

NUCLEAR CHEMISTRY SUROVIEC SPRING 2015 Chapter 19.

Chapter 3 Atomic Structure: Images of the Invisible James A. Noblet California State University San Bernardino, CA  2007 Prentice Hall Chemistry for Changing.

Nuclear Chemistry Determining Half-Life. Types of Radiation  Alpha particle (  )  helium nucleus paper 2+  Beta particle (  -)  electron 1- lead.

Integrated Science Mr. Danckers Chapter 10.

 Nuclear Chemistry. Nuclear Vs. Chemical Reactions  Nuclear reactions involve a change in an atom’s nucleus, usually producing a different element.

Chapter 19 Radioactivity & Nuclear Energy Chemistry B2A.

When the repulsive forces of the protons exceeds the ability of the strong nuclear force to hold them together, they are unstable. In addition, sometimes.

Nuclear Chemistry. The study of reactions that take place in the nucleii of atoms.

Science 9 Decay Problems #2 35 point total 1. State the number of protons & neutrons in the following: ProtonsNeutrons Fe C.

Nuclear Stability and Decay 1500 different nuclei are known. Only 264 are stable and do not decay. The stability of a nucleus depends on its neutron-to-

Nuclear Chemistry. Radioactivity  Nuclear Reactions – reactions in which the nuclei of unstable isotopes (radioisotopes) gain stability by undergoing.

NUCLEAR CHEMISTRY Chapter 20. Nuclear Chemistry Radioactivity is the emission of subatomic particles or high- energy electromagnetic radiation by the.

Nuclear Chemistry Physical Science.

NUCLEAR CHEMISTRY.

Nuclear Chemistry II. Radioactive Decay.

Nuclear Chemistry Radioactive Decay.

Presentation transcript:

Nuclear Chemistry Ch. 21

Radioactive Emissions

Alpha decay – He nucleus What product is formed when radium-226 undergoes alpha decay? What element undergoes alpha decay to form lead-208?

Beta particles – created by the conversion of a neutron in the nucleus to a proton and an electron (beta particle); the proton remains in the nucleus while the beta particle is ejected Iodine-131 undergoes decay by beta emission Lead-209 undergoes decay by beta emission

Electron Capture An inner shell electron is pulled into the nucleus where it combines with a proton to form a neutron; so atomic number decreases by 1, but atomic mass stays the same Mercury-201 undergoes electron capture

Gamma Rays – does not result in a change in the property of the atom

X A Z Mass Number Atomic Number Element Symbol Atomic number (Z) = number of protons in nucleus Mass number (A) = number of protons + number of neutrons = atomic number (Z) + number of neutrons A Z 1p1p 1 1H1H 1 or proton 1n1n 0 neutron 0e0e 00 or electron 0e0e +1 00 or positron 4 He 2 44 2 or  particle

Learning Check What radioactive isotope is produced in the following bombardment of boron? 10 B + 4 He ? + 1 n 5 2 0

Learning Check What radioactive isotope is produced in the following bombardment of boron? 10 B + 4 He 13 N + 1 n

Half-Life Time required for half of any given quantity of a substance to react