The Discovery of Radioactivity GROUP 8 Richard Loew Jace Grandinetti Edward Duran Emil Blumburg.

Slides:

Advertisements

Similar presentations

Sergio Medina, Brian Gonzales. Biography  Joseph John Thomson was born in Manchester, on April 18  Married Rose Elisabeth in 1890, and had two children.

Advertisements

Electrical Charge is fundamental to our understanding of the atom Atoms and Elements.

Radioactivity 1 輻射 Presented by Mr. Y. N. Chan LIU PO SHAN MEMORIAL COLLEGE.

Discovering Atomic Structure

Atomic Structure Objectives: 1. Discuss how atomic structure is related to electricity. 2. Explain what studies of cathode rays and radioactivity revealed.

4-5: Radioactive Elements

3-2 Discovering Atomic Structure

Main Menu Great Pyramids 2900 BCE Atomic Theory Founders of

Unit 13 - Nuclear Chemistry. Background 1896—Henri Becquerel discovered radioactivity; was studying the ability of uranium salts exposed to sunlight to.

Chapter 4 & 25 Nuclear Chemistry

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,

ATOMS The discovery and structure of atoms.. 1. Elements are composed of extremely small particles called atoms. All atoms of a given element are identical.

CHEMISTRY 161 Chapter The Early Atomic Theory pure substances compounds elements combine different elements H 2, O 2 H 2 O [O 3 ] John Dalton.

Atoms and Atomic Theory Chapter Early Chemical Discoveries and the Atomic Theory.

Lecture 49/7/05 Homework concerns Atomic Structure.

1 Atomic Physics. 2 In 1896 Henri Becquerel discovered that certain uranium compounds would fog photographic plates as if exposed to light. He discovered.

Trefoil Symbol – symbol for ionising radiation The Discovery of Radioactivity Henri Becquerel (1896): Investigated the effect of sunlight on crystals.

Learning Outcomes Historical outline of radioactivity: work of Becquerel (discovery of radiation from uranium salts); Marie and Pierre Curie (discovery.

Chapter 3 Chemistry The Atom I. Early ideas A. ___________ (450 BC)- all matter is made of tiny indivisible particles – atomos. _________- the smallest.

11 Atomic Theory. 2 A HISTORY OF THE STRUCTURE OF THE ATOM.

Chapter 2 Atoms, Molecules, Ions.

Atomic Theory PS 9.26 PS 9.27 What is the nature of matter? The ancient Greeks pondered that question. Empedocles in 460 B.C.suggested that all matter.

Which of these three kinds of rays carries no electrical charge?

Fundamental Chemical Laws

Ap CHemistry Chapter Two Atoms & Elements Please do not memorize dates--I will never ask you for an exact one. However, you should have an idea (century-wise)

Chapter 30: Nuclear Physics and Radioactivity. Radioactivity Radioactivity is the discentigration of an unstable nuclei. when the nuclei decays the nucleus.

Radiation The emission of energetic particles The study of it and the processes that produce it is called nuclear chemistry. Unlike the chemistry we have.

History and Introduction Why Radiochemistry IGERT program at Hunter College.

Radioactivity. Henri Becquerel In 1896, Becquerel observed that uranium compounds emitted a penetrating radiation that passed through paper and affected.

Unit IV: Nuclear Physics. What is Radioactivity?  Is the spontaneous breakdown of an unstable nucleus.  Results in the emission of particles or electromagnetic.

DISCOVERY OF RADIOACTIVITY

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.

Atoms, Molecules, and Ions Chapter 2 Atoms, Molecules, and Ions John D. Bookstaver St. Charles Community College St. Peters, MO  2006, Prentice Hall,

Discovery of Radioactivity

ATOMIC THEORY Honors Chemistry Mr. McKenzie. Atomic Structure Essential Questions: –How was the modern theory of atomic structure developed? –What are.

Modern Version of the Experiment: Using electricity, water is electrolyzed into its components, hydrogen and oxygen. Results: Water is always found to.

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

Chapter 25 Nuclear Chemistry 25.1 Nuclear Radiation

By: Jose Tapay & Gurleen Dhaliwal James Chadwick.

Atoms, Molecules and Ions Chapter 2. Foundations of Atomic Theory Law of conservation of mass: Antoine Lavoisier –Mass is neither created nor destroyed.

Models of Atomic Structure. Dalton’s Small Dense Sphere.

Nuclear Chemistry – Radioactive Decay Tuesday, October 13 th, 2015 Textbook pages 799 – 802, 807 – 808.

Radioactivity and radioisotopes

PreAP Chemistry Chapter 4 Chapter 4 Annotation Questions Due to the box NOW! Late is only worth 60%, but is better than 0%!

Ch 21: Nuclear Chemistry. Section Radioactivity.

History of the Atom. Democritus of Abdera Democritus: BCE Greek mathematician and philosopher Co-author (with Leucippus) of the idea that all.

The History of the Atom Democritus to Rutherford.

THE HISTORY OF AN ATOM. What is an Atom? Atom is a portion of an element that takes part in chemical reactions. Atom is a portion of an element that takes.

Page 1 IB Physics: Atomic, Nuclear, and Particle Physics Nucleus –Nucleons (A) = Protons (Z) + Neutrons (N) –Mass and Atomic Numbers –Number of protons.

Radioactivity What is it? Radioactivity is the spontaneous breaking up of unstable nuclei with the emission of one or more types of radiation Radioactivity.

Discovery of Atomic Structure. Cathode Ray Mid 1800’s: scientists studying electrical discharge through tubes pumped almost empty of air. High voltage.

The Structure of the Atom Chemistry – Chapter 4. Early Theories of Matter Philosophers ◦ Democritus was first to propose Atomic Theory:  Matter composed.

1 UNIT 2 Atoms, Molecules, and Ions. 2 The Power of 10 nceopticsu/powersof10/

Atomic Structure Power Point First Part Chemistry I-AAHS Dr. Gray.

Atoms, Molecules and Ions Chapter 2. Foundations of Atomic Theory _________________________________________ –Mass is neither created nor destroyed. The.

Ch 21: Nuclear Chemistry. Radioactivity Wilhelm Roentgen made a big discovery in He found that invisible rays were emitted when electrons bombarded.

UNIT 2 Atoms, Molecules, and Ions. 1. Each element is composed of extremely small particles called atoms. 2. All atoms of a given element are identical.

Radioactivity P1b Observing Alpha, Beta and Gamma radiation.

Nuclear Chemistry – Radioactive Decay

NUCLEAR PHYSICS.

Test over: Periodic Table Structure Pg. 30 Periodic Families Pg. 31

Unit 2 - Lecture 1: Structure of the Atom

Nuclear Chemistry – Radioactive Decay

Radioactivity Chapter 8.

Radioactive Decay Atomic Physics.

UNIT 15: NUCLEAR CHEMISTRY

5.1 - Nuclear Chemistry.

NOTE: The spatial distribution depends on the particular frequencies involved  x 2  1 k k =  x  Two waves of slightly different wavelength and.

Nuclear Chemistry – Radioactive Decay

Presentation transcript:

The Discovery of Radioactivity GROUP 8 Richard Loew Jace Grandinetti Edward Duran Emil Blumburg

Topics Discovery of Radioactivity Properties of Radioactive atoms Impact on Physics Future Applications

Becquerel discovered radioactivity while studying phosphorescence. Found that uranyl sulfate, K 2 UO 2 (SO 4 ) 2, could expose a photographic plate without being exposed to light. Found other uranium compounds did the same, even if they were known to be non-phosphorescent.

Properties of Radioactive Compounds Generally heavy atomic weight (Z < 82) Emission of several types of radiation Penetration Ionization Deflection by an electric field For brevity, Becquerel denoted the rays as α, β, and γ

The α-ray Minimal penetration Slight deflection from magnetic field Positively charged Charge-to-mass ratio is more than twice that of the canal ray (Proton)

The β-ray Moderate penetrative ability Negatively charged Very deflected by an electric field Charge-to-mass ratio roughly equal to cathode rays (electrons) ▫Calculated by finding the radius of curvature when passing through an electric field.

The γ-ray Extremely penetrating Not deflected by electric field Similar to X-rays, but not as ionizing. Exposure is hazardous

Impact of Discovery More in-depth analysis of the nature of the nucleus Expansion of the periodic table Led to the invention of the atomic bomb Medical Imaging Direct cause of death for both Ernest Rutherford and Marie Curie

Future Applications

Bibliography Henri Becquerel - Nobel Lecture: On Radioactivity, a New Property of Matter". Nobelprize.org. Nobel Media AB Web. 2 Dec /becquerel-lecture.html Ernest Rutherford. “Radio-activity”. 2 nd edition, Nov alpha-ray-beta-ray.html DC/Marvel comics and 20 th Century Fox

Questions?