Radioactivity and Half-Life

Slides:

Advertisements

Similar presentations

Hosted By Tristan Holmgren and Adam Belmnahia Radiation Transmutations Half-Life Uses and dangers of radio isotopes

Advertisements

NUCLEAR CHEMISTRY DO NOW: Answer the following questions

Aim: What is the half-life of a radioisotope Do Now:

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

Environmental Science Introduction to Nuclear Energy Lecture Notes

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

Radioactivity Lab Prompt

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

REVIEW. Nuclear Decay Subatomic Particles Protons- plus charge In the nucleus Neutrons- neutral Electrons - negative charge Outside the nucleus 4.

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.

Nuclear Chemistry.

Atomic Structure.

The Nucleus and Radioactivity

Chapter 21 Nuclear Chemistry

Alpha, Beta, and Gamma Decay

Nuclear Radiation Natural Radioactivity Nuclear Equations

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

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

Radioactive Isotope Isotope which is unstable. It emits radiation & changes into another kind of atom.

Chapter 18.  Mass # Symbol  Element Name or symbol – Mass #  Parts of a Reaction Reactants  Products.

Nuclear Chemistry Nuclear chemistry is the study of the structure of atomic nuclei and the changes they undergo.

Nuclear Radiation nuclear reactions different from other reactions – ________________________________________ ________________________________________.

Atomic Stability. Isotopes Isotopes are atoms of an element that have different numbers of neutrons in their nucleus. Cu Copper – 63 OR Copper.

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.

Chapter 9 Nuclear Radiation

1 Radioactivity and Half-Life. 2 Radioactivity An unstable atomic nucleus emits a form of radiation (alpha, beta, or gamma) to become stable. In other.

Unit 2: The Atom Half- Life. Half Life The time required for one half of the nuclei of a radioactive isotope sample to decay to atoms of a new element.

Nuclear Chemistry. What is radioactivity? What are the 3 types of nuclear radiation? 2.

Half-Life Notes Headsium Decay # of ½ lives IndividualLab Island ClassCourse

Radioactive Decay. What do you know about Radioactivity? 1.All atoms are made up of __________. 2.What are some radioactive isotopes? 3.Why do some isotopes/atoms.

1 Clip. 2 Radioactivity An unstable atomic nucleus emits a form of radiation (alpha, beta, or gamma) to become stable. In other words, the nucleus decays.

Review. What type of decay will happen if the nucleus contains too many neutrons? Beta Decay.

Isotopic Abundance Reminder: bring a calculator to class.

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

Nuclear Chemistry Objective: To explain the process of radioactive decay using nuclear equations and half life Essential Question: How do unstable (radioactive)

Nuclear Chemistry The Atom The atom consists of two parts: 1. The nucleus which contains: 2. Orbiting electrons. protons neutrons Multiple nuclei is.

Nuclear Chemistry Chapter 25. What do you think of when you hear Nuclear Chemistry?

Section 3: Radioactive Decay and Half-Life.  The spontaneous emission of rays or particles from certain nuclei as they “decay,” such as Uranium.  These.

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

Application of Nuclear Chemistry Cancer Treatment – Cancer cells are more susceptible to radiation bc they are fast growing. Thyroid cancer can be treated.

D AILY SCIENCE Write the following elements using short hand notation: 1. Helium 2. Tin 3. Zinc 4. Chlorine 5. Tungsten.

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

Radioactive Decay.

Nuclear Chemistry. The Atom The atom consists of two parts: 1. The nucleus which contains: 2. Orbiting electrons. protons neutrons.

© Copyright Pearson Prentice Hall Radioactivity. © Copyright Pearson Prentice Hall Chemistry Joke Q: What do you get when you put Jim Carrey in jail?

Nuclear Radiation Half-Life. What is Radiation? Penetrating rays and particles emitted by a radioactive source Result of a nuclear reaction! –Involves.

QOTD How do we measure the stability of an atom?.

NUCLEAR CHEMISTRY OBJECTIVE: TO EXPLAIN THE PROCESS OF RADIOACTIVE DECAY USING NUCLEAR EQUATIONS AND HALF LIFE Essential Question: How do unstable (radioactive)

Section 1: What is Radioactivity?

Radiation Foldable Setup. Your Name radiation radioactive irradiated decay half life contamination.

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.

Exit Ticket: 10/9/14 CH ) 1)What is a radioactive isotope? 2) 2)What causes an atom to be radioactive? 3) 3)What are the three types of nuclear radiation,

Nuclear Symbols Element symbol Mass number (p + + n o ) Atomic number (number of p + )

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

Radioactive Decay. Types of Radioactive Decay Alpha Decay: nucleus eject an alpha particle (made of 2 protons and 2 neutrons – a helium nucleus)

Integrated Science Mr. Danckers Chapter 10.

Radioactive Decay and Half Life of Isotopes. Radioactive decay Alpha, Beta and Gamma.

Unstable Nuclei and Radioactive Decay Radioactivity – spontaneous emission of radiation Radiation – rays and particles emitted from a radioactive material.

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-

The Atomic Nucleus--Natural Radioactivity

Chapter 4. Chapter 4 Terms 1.Atom 2.Electron 3.Nucleus 4.Proton 5.Neutron 6.Atomic number 7.Isotope 8.Mass number 9.Atomic mass 10.Radioactivity 11.Alpha.

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

Nuclear Chemistry Radiation. Background – Atomic Structure Electrons Nucleus Protons + neutrons.

NUCLEAR CHEMISTRY. Isotopes atoms of the same element with different numbers of neutrons.

Radioactive Isotopes and Half Life 1. I can explain what a Radioactive Half-Life is and do a calculation with both a T-table and by equation. 2.

Radioactivity and Half-Life

It’s better to have a half-life than no life!

NUCLEAR CHEMISTRY.

Presentation transcript:

Radioactivity and Half-Life Integrated Science 1

Radioactivity An unstable atomic nucleus emits a form of radiation (alpha, beta, or gamma) to become stable. In other words, the nucleus decays into a different atom.

Radioactivity Alpha Particle – Helium nucleus Beta Particle – electron Gamma Ray – high-energy photon

Half-Life Amount of time it takes for one half of a sample of radioactive atoms to decay

Medical Applications of Half-Life Nuclide Half-Life Area of Body I–131 8.1 days Thyroid Fe–59 45.1 days Red Blood Cells Sr–87 2.8 hours Bones Tc–99 6.0 hours Heart Na–24 14.8 hours Circulatory System

Half-Life Calculation #1 You have 400 mg of a radioisotope with a half-life of 5 minutes. How much will be left after 30 minutes?

Half-Life Calculation #2 Suppose you have a 100 mg sample of Au-191, which has a half-life of 3.4 hours. How much will remain after 10.2 hours?

Half-Life Calculation # 3 Cobalt-60 is a radioactive isotope used in cancer treatment. Co-60 has a half-life of 5 years. If a hospital starts with a 1000 mg supply, how many mg will need to be purchased after 10 years to replenish the original supply?

Half-Life Calculation # 4 A radioisotope has a half-life of 1 hour. If you began with a 100 g sample of the element at noon, how much remains at 3 PM? At 6 PM? At 10 PM?

Half-Life Calculation # 5 How many half-lives have passed if 255 g of Co-60 remain from a sample of 8160 g?

Half-Life Calculation # 6 Suppose you have a sample containing 400 nuclei of a radioisotope. If only 25 nuclei remain after one hour, what is the half-life of the isotope?

Half-Life Calculation # 7 If a radioactive element has diminished by 7/8 of its original amount in 30 seconds, what is its half-life?

Answers to Half-Life Calculations 6.25 mg Half-Life Calculation #2 12.5 mg Half-Life Calculation #3 750 mg

Answers to Half-Life Calculations 12.5 g, 1.5625 g, 0.09765625 g Half-Life Calculation #5 5 half-lives

Answers to Half-Life Calculations 15 minutes Half-Life Calculation #7 10 seconds