Notes 4-5 Radioactive Elements. Isotopes Atoms with same number of protons but different numbers of neutrons Example: Carbon-12 (normal carbon) versus.

Slides:



Advertisements
Similar presentations
Good Day! 4/11/2017 Discuss the uses of Radioactive Isotopes.
Advertisements

4-5: Radioactive Elements
Unstable Nuclei and Radioactive Decay
Unstable Nuclei and Radioactive Decay
Unstable Nuclei and Radioactive Decay Objectives: 9.0 Distinguish between chemical and nuclear reactions. 9.3 Identifying types of radiation and their.
11.1 Nuclear Reactions An atom is characterized by its atomic number, Z, and its mass number, A. The mass number gives the total number of nucleons,
Nuclear Energy Radioactivity and Half-Life FissionFusion.
1 Atomic Physics. 2 In 1896 Henri Becquerel discovered that certain uranium compounds would fog photographic plates as if exposed to light. He discovered.
Learning Outcomes Historical outline of radioactivity: work of Becquerel (discovery of radiation from uranium salts); Marie and Pierre Curie (discovery.
Learning Targets I can name the force that holds the atom’s nucleus together I can describe the two reasons why some isotopes are radioactive. I can describe.
Notes 4-1 Intro to Atoms.
Radioactivity 5 th Year Chemistry. Recap Henri Bacquerel – uranium and photographic plate Marie Curie – pitchblende, polonium and radium Define Radioactivity?
Please answer the question on the board.
Lesson 2: It’s Greek to Me
DIFFERENTIATE BETWEEN FISSION AND FUSION.
Integrated Science Chapter 25 Notes
Intro to Atoms Notes 4-1. Let’s see how much you remember….
NUCLEAR CHEMISTRY. Most stable nuclei contain even numbers of both neutrons and protons.
RADIOACTIVE ELEMENTS. A Quick Review What makes carbon carbon? What defines an element? The number of protons!!!
Chemical Reactions Involves the change of one or more substances into new substances Atoms are rearranged but their identities do NOT change The reaction.
Chapter 9: Radioactivity and Nuclear Reactions The last chapter we will study!
Notes 4-5 Radioactive Elements.
Alpha Decay. Radioactive Decay Alpha Decay Radioactive Decay Alpha Decay Beta Decay.
NUCLEAR CHANGES CHAPTER 7
Chemistry Chapter 4 Notes #3 (Sec 4). Unstable Nuclei Nuclear Reactions Nuclear Reactions –Rxns that involve a change in the nucleus of an atom (most.
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.
Nuclear Radiation.
Scientists in the late 1800s determined that there were different types of radiation in addition to visible light. Some types of radiation have mass, some.
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.
Chapter 4 Section 5: Radioactive Elements. Radioactivity The atomic nuclei of unstable isotopes (atoms with the same number of protons and different numbers.
Transmutation- When the nucleus of one element changes to the nucleus of another Stability- Most elements are very stable - Those above atomic number.
Isotopes & Radioisotopes Section 3.6. What is an isotope? Two or more forms of an element. Each form has the same number of protons but a different number.
Radioactive Decay Alpha, Beta, and Gamma Decay. Radioactivity Emission of particles and energy from the nucleus of certain atoms This happens through.
Radioactivity Chapter 4: Section 1.
Chapter Preview 4.1 Introduction to Atoms 4.2 Organizing the Elements 4.3 Metals 4.4 Nonmetals, Inert Gases, and Semimetals 4.5 Radioactive Elements Table.
Radioactive Decay Radioactivity results from having an unstable nucleus. When these nuclei lose energy and break apart, decay occurs. Radioactive decay.
Radiation What is it? Where does it come from?. Radiation discovered Henri Becquerel discovered an invisible, penetrating radiation emitted spontaneously.
7.1 Nuclear Reactions What are atoms made of? Which particles are found in the nucleus? What are the three types of ionising radiation? What are the three.
 Test on Friday – Make sure you are studying!!  If you got below an 85 on your test, you can come to my Knight Time… Talk to me if you are interested.
Radioactive Decay.
Radioactive Decay.
Atomic #  # of protons in an atom  Never changes for a given element  Therefore, used to always identify the element.
Inorganic chemistry Assistance Lecturer Amjad Ahmed Jumaa Isotopes of uranium. Nuclear chemistry. Types of radiations. 1.
Early Pioneers in Radioactivity Roentgen: Discoverer of X-rays 1895 Becquerel: Discoverer of Radioactivity 1896 The Curies: Discoverers of Radium and Polonium.
Radioactive Material Review. What determines the atoms identity?
Radiation What is it? Where does it come from?. Radiation discovered Henri Becquerel discovered an invisible, penetrating radiation emitted spontaneously.
HomeworkHomework Read section 4.4 Answer questions 26 & 27 on page 107.
P2 7.1 Nuclear reactions Some atoms have an unstable nucleus and need to get to a lower energy state. It can become stable by emitting Alpha, Beta or.
7.1 continued: Radioactive Decay. A brief review of last class…
Alpha and Beta Decay. Nuclear Reactions 1.Occur when nuclei emit particles and/or rays. 2.Atoms are often converted into atoms of another element. 3.May.
Radioactive Elements Chapter 4.5.
Nuclear Decay. Radioactivity The emission of high-energy radiation or particles from the nucleus of a radioactive atom.
NUCLEAR CHEMISTRY Chapter 20. Nuclear Chemistry Radioactivity is the emission of subatomic particles or high- energy electromagnetic radiation by the.
Nuclear Physics An Introduction. What does it mean when something is “Radioactive”? Atomic nuclei that emit particles and energy are said to be radioactive.
20-4 Radioactive Elements. Nuclear Reaction  Involve the particles in the nucleus of atoms  Can change one element into a new element if the number.
Nuclear Chemistry.
Section 5: Radioactive Elements
Radioactivity.
Chapter 4: Atomic Energy
Chapter 4: Atomic Energy
Need to know Historical outline of radioactivity: work of Becquerel (discovery of radiation from uranium salts); Marie and Pierre Curie (discovery of polonium.
Radioactivity.
Radioactive Decay.
Radioactivity Chapter 8.
Radioactive Decay Atomic Physics.
Metalloids, Nonmetals, Radioactive Elements
Nuclear Decay Song on Youtube
Section 5 - pg 158 Radioactive Elements
Chemistry Unit Two, Day Four.
Presentation transcript:

Notes 4-5 Radioactive Elements

Isotopes Atoms with same number of protons but different numbers of neutrons Example: Carbon-12 (normal carbon) versus Carbon-14 Some isotopes are unstable Nuclei break down in a process of radioactive decay, releasing particles and energy

Radioactivity Radioactivity is the spontaneous emission of radiation. Example: Uranium, Polonium, Radium Henri Becquerel discovered the effects of radioactive decay by accident while studying a mineral that contained uranium. There are 3 types of radioactive decay

Types of Radioactive Decay During alpha decay, a nucleus loses an alpha particle, which consists of two protons and two neutrons. * Decreases atomic # by 2, and mass # by 4

Types of Radioactive Decay During beta decay, a neutron inside an unstable nucleus changes into a negatively charged beta particle and a proton. * Atomic # increases by 1, mass # remains the same

Types of Radioactive Decay Gamma radiation has no charge and does not cause a change in either the atomic mass or the atomic number.

Types of Radioactive Decay The three types of nuclear radiation were named based on how easily each one could be blocked. Alpha, beta, and gamma are the first three letters of the Greek alphabet.

Tracers Tracers are radioactive isotopes that can be followed through the steps of a chemical reaction or an industrial process. Turn to page 162 in your textbook and review how Phosphorus-32 is absorbed by plant roots so that biologists can learn where and how plants use phosphorus. In industry, tracers can be used to find weak spots in metal pipes.

Using Radioactive Isotopes Cancer treatment Chemical reactions Industrial processes Electricity Smoke detectors Pest control Rock/ fossil dating Food treatment Nuclear weapons

Risks of Radioactive Isotopes Burn causing Cancer causing Genetic mutations death

Review Use your periodic table to predict the element that forms in each case of radioactive decay: IsotopeType of DecayElement Formed Uranium-238Alpha Nickel-63Beta Iodine-131Beta Radium-226Alpha Thorium-234 Copper-63 Xenon-131 Radon-222

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.