Rutherford’s Experiment in 1911 (proving atoms are mostly space with dense small nucleus) Tahoma Jr. High 8 th Grade Science Maple Valley, WA drawing not.

Slides:

Advertisements

Similar presentations

Chapter 11 Radioactive Elements.

Advertisements

-Jordan Heffler and Nate Rose. Born August 30, 1871 Born in Bridgewater, New Zealand Died October 19, 1937 Worked with Hans Geiger and Ernest Marsden.

DO NOW How do you know what wind is? Objective: Describe ancient Greek models of matter and explain how Thomson and Rutherford used data from experiments.

Chapter 17 The Atomic Nature of Matter

“Atomic Structure”. The Greek philosopher Democritus (460 B.C. – 370 B.C.) The Greek philosopher Democritus (460 B.C. – 370 B.C.) He believed that atoms.

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.

Rutherford’s Gold Foil Experiment

THE ATOM! ERNEST RUTHERFORD BY Saxon de Araujo. Assignment 4 Ernest Rutherford Ernest Rutherford conducted a famous experiment called the gold foil experiment.

ERNEST RUTHERFORD & THE GOLD FOIL EXPERIMENT By Jake Easton & James Lampmann.

The Scientists of the Atomic Theory

History of the Atom How the work of one scientist built upon the work of others to bring us to greater and greater understanding of the atom!

The Complete Modern Atom

ERNEST RUTHERFORD AND THE ATOMIC MODEL

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.

Chapter 4: Discovery of Atomic Structure. Prentice Hall © 2003Chapter 2 The Discovery of Atomic Structure An ancient Greek named Democritus was the first.

Science Starter: Black Boxes Groups of 2: Manipulate the box so the marble moves around the fixed object inside of the box. DO NOT OPEN THE BOX Discuss.

Models of the Atom.

 As early as 400 BC, a few people believed that atoms are the building blocks of all matter. Yet, until recently, even scientists had never seen evidence.

Atomic Model Scientists Nuclear Chem ParticlesPotpourri Final.

Ch. 24--Nuclear Chemistry “It’s all about the nucleus!”

Section 2: Atomic Discoveries

Unit 1 – Atomic Structure Bravo – 15,000 kilotons.

~450BC Who was the first to propose that matter was made of tiny indivisible particles ?

Atomic Theory. The Atom Recall the atom is the smallest particle making up an element.

Ch. 3: Atomic Structure The Theory of the Atom ________________, a famous Greek teacher who lived in the 4th Century B.C., first suggested the idea of.

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

History of the Atom. What do you know about the atom? Put simply, the atom is the smallest particle of pure essence. For example, helium gas is made up.

A Brief History of the Modern Atomic Model ’s Pgs , Chemistry Matter and Change.

In 1782, a French chemist, Antoine Lavoisier ( ), made measurements of chemical change in a sealed container. Development of the Modern Atomic.

Rutherford and Bohr Rutherford – Structure of the Atom

Rutherford’s Gold-Foil Experiment

By: Brian Kober, Albert Lyou, and Charlie Romero.

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

Molly Bullock Brad Roche Ivan Espino

Atomic Structure.

 New Zealand born scientist tested Thompson’s model of the atom while working in England  Rutherford’s famous “Gold Foil” experiment led him to include.

The Bohr Rutherford Model I wonder what your house is like?

Ernest Rutherford (Nelson, New Zealand).

Part 2: Rutherford and the Gold Foil Experiment

The Atom Unit 3, Presentation 1. History of the atom Not the history of atom, but the idea of the atom – The atom was not “discovered” until recently.

The History of the Atom.

Chapter 3 Atoms and their structure History of the atom n Original idea Ancient Greece (400 B.C.) n Democritus and Leucippus- Greek philosophers. n Aristotle.

 Ernest Rutherford  Physicist  Ernest Rutherford, 1st Baron Rutherford of Nelson, was a New Zealand-born physicist who became known as the father of.

Atomic Model Scientists Nuclear Chem ParticlesPotpourri Final.

History of Atomic Theory Chapter 5 - Part 2. Objectives - 1 List the 4 parts of Dalton’s Atomic Theory ad explain its significance to the history of modern.

Ch. 3: Atomic Structure The Theory of the Atom ________________, a famous Greek teacher who lived in the 4th Century B.C., first suggested the idea of.

Roy Kennedy Massachusetts Bay Community College Wellesley Hills, MA Introductory Chemistry, 2 nd Edition Nivaldo Tro Chapter 4 Atoms and Elements 2006,

Nuclear Chemistry Unit 4. History Wilhelm Conrad Roentgen ( ) Wilhelm Conrad Roentgen ( ) Awarded a Nobel Prize in Physics in 1901 Awarded.

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

BY: GLORIA NGO WILSON WONG SIMON JINAPHANT JOSEPH CHU ERNEST RUTHERFORD.

History of the Atom By: Caitlyn Surdel. Ernest Rutherford.

Ch 5: Atomic Structure. warmup All matter is composed of very small particles called atoms. In middle school science you learned about the atom. 1. Draw.

Ch. 2 The History of the Atom Z:\video streaming\Matter_Is_A nything_That_Takes_U p_Space.asf.

How Rutherford Discovered the Nucleus: One of science’s greatest experiments!

ERNEST RUTHERFORD Bethany Wallace Katherine Knowtlon Alex Backers.

You need to know: The structure of an atom The charge of a nucleus The structure of an alpha particle + + 

DEVELOPMENT OF THE ATOMIC THEORY Atom- smallest particle into which an element can be divided and still be the same substance Called the building blocks.

Development of Atomic Models In 1897, J.J. Thompson discovered that matter, and thus atoms contain negatively charged particles which he called electrons.

Aim: What makes the atoms of one element different to the atoms of another element?

By the end of this presentation you should be able to……

Chapter 3 Experiments of Thomson and Millikan

Chapter 8 The Composition of the atom

Rutherford’s Atomic Model

Unit 2 - Lecture 1: Structure of the Atom

Tro's "Introductory Chemistry", Chapter 4

Presentation transcript:

Rutherford’s Experiment in 1911 (proving atoms are mostly space with dense small nucleus) Tahoma Jr. High 8 th Grade Science Maple Valley, WA drawing not even close to being to scale

Ernest Rutherford (1871 – 1937) New Zealand born – British scientist (they had better labs in Europe) He is known as “The Father of Nuclear Physics” (for figuring out atomic structure) and remember… atoms are so small they are essentially invisible, and yet he did this 100 years ago!

Rutherford wanted to find out what was inside atoms that made up all matter. He needed a small “gun” to shoot very small particles through the atom. Luckily, there was such an “atomic” gun available – with newly discovered radioactivity.

In 1896 – Frenchman Henri Becquerel stored some unusual rocks on undeveloped chemical film sealed in black paper inside his desk drawer. Later, when he developed the film, the rock had left an image on the film. Somehow, particles went through the paper and reacted with the film – in the dark, where there was no light.

a BECAUSE I LOVE U (get it?! – what does “U” stand for in chemistry?)

Rutherford put a small amount of radioactive material in a lead box with a hole in one end – particles could only come out the hole (lead is very dense). Where have you had lead used to protect you from x-rays? Lead aprons put over you at dentist/hospital. Superman’s X-ray vision does not work through lead. (there’s a lot of good science in science-fiction!)

The small particles were shot at a VERY VERY thin piece of gold foil. Gold is made of very big heavy atoms (why it weighs so much for its size) and can also be pounded into very thin sheets without breaking… making the sheet only a few atoms thick.

Surrounding the gold foil was a screen that would glow when hit with particles (similar to how your TV works)

Rutherford found that most particles went through as if nothing was in the way (atoms are mostly space) – but a few would get deflected at some pretty sharp angles (meaning they hit something very dense and bounced off).

He also discovered the nucleus was positively charged (leading to his discovery of protons) and that radioactive materials decay into different elements. Atoms, therefore, must have a small, but VERY dense nucleus!

We are going to be just thinking of atoms “from the outside”. Even though Rutherford (and others) were able to figure out what was going on inside of an atom (think about how small these atoms are and they were doing this over 100 years ago!) we won’t be dealing with the inside of the atom in 8 th Science. table salt crystal sodium atoms = purple chlorine atoms = green

But you probably never heard of him because most people can’t appreciate what he did since they don’t know much about chemistry or atoms. But now you do ! He won the Nobel Prize for Chemistry and became so famous, when he died, he was buried next to Sir Isaac Newton in England. end show