Energy is the ability to do work. There are two basic types of energy: 1. Kinetic Energy- The energy of motion. We use this equation: where m = mass of.

Slides:



Advertisements
Similar presentations
WHAT IS ENERGY? ABILITY TO DO WORK MEASURED IN JOULES (J)
Advertisements

Where is the Electron Located?
The photoelectric effect and the photon theory of light
Waves. Characteristics of Waves Frequency Amplitude.
Early Quantum Theory and Models of the Atom
Unit 6 Chapter 6 and Why are our bodies so large compared to an atom? Why is the atom so small? Think about it!
Chapter 7 Quantum Theory of the Atom Copyright © Houghton Mifflin Company. All rights reserved. What are the electrons doing in the atom? Why do atoms.
Electromagnetic Radiation
CHAPTER 6 ELECTRONIC STRUCTURE OF ATOMS. CHAPTER 6 TOPICS THE QUANTUM MECHANICAL MODEL OF THE ATOM USE THE MODEL IN CHAPTER 7 TO EXPLAIN THE PERIODIC.
Chapter 5 Electrons In Atoms.
Pre-IB/Pre-AP CHEMISTRY
4-1 Radiant Energy. Waves  Light travels in Waves similar to ocean waves  Light waves are electromagnetic and consist of an electric and magnetic fields.
The Modern Atom Figure: 05-00CO Caption:
Chapter 7: Quantum Theory and Atomic Structure
Entry Task: October 12 th Friday Question: What makes up the colors in a rainbow? What other types of waves exist? You have 5 minutes!
Light is energy that travels in electromagnetic waves, meaning it can travel through a medium (matter) or through a vacuum (empty space). The speed of.
Structure of Atoms Rutherford's model of the atom was a great advance, however, it does not give an satisfactory treatment of the electrons. To improve.
Classical vs Quantum Mechanics Rutherford’s model of the atom: electrons orbiting around a dense, massive positive nucleus Expected to be able to use classical.
The Photoelectric Effect
What is Light? What are Electrons?. Light Is light a wave or a stream of particles?
Chapter 71 Atomic Structure Chapter 7. 2 Electromagnetic Radiation -Visible light is a small portion of the electromagnetic spectrum.
Modern Atomic Theory Ms. Hoang ACP Chemistry. Summary  Visible light is a small section of the EM spectrum  Light exhibits wave-like and particle-like.
Wave Nature of Light and Quantum Theory
Electron Configurations & the Periodic Table Chapter 7.
NCCS & Properties of Light The Wave Description of Light Electromagnetic radiation is a form of energy that exhibits wavelike behavior.
Chapter 4 Arrangement of Electrons in Atoms
Guiding Questions 1. How fast does light travel? How can this speed be measured? 2. Why do we think light is a wave? What kind of wave is it? 3. How is.
Where are the electrons ? Rutherford found the nucleus to be in the center. He determined that the atom was mostly empty space. So, how are the electrons.
Chapter 4 Arrangement of Electrons in Atoms
Energy. Radiant Energy Radiant: think light…. How does light carry energy through space???
CHAPTER 4 Electrons in Atoms.
Electrons in Atoms Chapter 5. Duality of Light Einstein proved that matter and energy are related E = mc 2 Einstein proved that matter and energy are.
Chemistry 330 Chapter 11 Quantum Mechanics – The Concepts.
Physics and the Quantum Mechanical Model Notes. Light and the Atomic Spectrum Light is composed of waves at different wavelengths The wave is composed.
1 Chapter 7 Atomic Structure. 2 Light n Made up of electromagnetic radiation n Waves of electric and magnetic fields at right angles to each other.
1 The Quantum Mechanical Model of the Atom Chapter 7.
Chapter 7 Atomic Structure. Light Made up of electromagnetic radiation Waves of electric and magnetic fields at right angles to each other.
AP Notes Chapter 6 Atomic Structure Describe properties of electromagnetic radiation Describe properties of electromagnetic radiation Light & relationship.
Slide 1 of 38 chemistry. Slide 2 of 38 © Copyright Pearson Prentice Hall Physics and the Quantum Mechanical Model > Light The amplitude of a wave is the.
Chapter 7 Atomic Structure and Periodicity
Later Contributors to Atomic Theory Pg nd Note Taking Sheet ©2011 University of Illinois Board of Trustees
Chapter 7 Atomic Structure. Light  Made up of electromagnetic radiation  Waves of electric and magnetic fields at right angles to each other.
Electrons in Atoms The Development of a New Atomic Model.
Particles as waves and Light as particles Chapter 6 part II.
Modern Chemistry Chapter 4 Arrangement of Electrons in Atoms Sections 1-3 The Development of a New Atomic Model The Quantum Model of the Atom Electron.
Electrons and Light. Light’s relationship to matter Atoms can absorb energy, but they must eventually release it When atoms emit energy, it is released.
The Electromagnetic Spectrum Coach Smith. EM Spectrum 0 Types 0 Radio 0 Microwave 0 Infrared 0 Visible light 0 Ultraviolet 0 X-rays 0 Gamma rays.
Electrons in Atoms Light is a kind of electromagnetic radiation. All forms of electromagnetic radiation move at 3.00 x 10 8 m/s. The origin is the baseline.
Electromagnetic Spectrum Basics Pg
 Explain important properties of the electromagnetic spectrum  Describe the important characteristics of light  Discuss and calculate the speed of.
Section 5.1 Light and Quantized Energy. Objectives Compare the wave and particle models of light Compare the wave and particle models of light Define.
Properties of Light The Wave Description of Light
Chemistry I Chapter 4 Arrangement of Electrons. Electromagnetic Radiation Energy that exhibits wavelike behavior and travels through space Moves at the.
Section 1 The Development of a New Atomic Model Objectives Explain the mathematical relationship among the speed, wavelength, and frequency of electromagnetic.
Light Light is a kind of electromagnetic radiation, which is a from of energy that exhibits wavelike behavior as it travels through space. Other forms.
Electrons in Atoms The Development of a New Atomic Model.
Preview Objectives Properties of Light Wavelength and Frequency The Photoelectric Effect The Hydrogen-Atom Line-Emission Spectrum Bohr Model of the Hydrogen.
Waves and the EM Spectra
Chapter 7 The Quantum-Mechanical Model of the Atom ( )
The Nature of Light – Atomic Spectroscopy and the Bohr Model
Arrangement of electrons in atoms
Electromagnetic Radiation
THEORIES OF LIGHT Is light a wave or a stream of particles?
Chemistry 141 Friday, October 27, 2017 Lecture 22 Light and Matter
Chapter 4 The Wave Description of Light
Light and Energy Electromagnetic Radiation is a form of energy that is created through the interaction of electrical and magnetic fields. It displays wave-like.
Arrangement of Electrons in Atoms
The Electronic Structure of Atoms
Arrangement of Electrons
Unit 3: Light and Electrons
Presentation transcript:

Energy is the ability to do work. There are two basic types of energy: 1. Kinetic Energy- The energy of motion. We use this equation: where m = mass of object v = speed of object 2. Potential Energy- exists whenever an object which has mass has a position within a force field. We use this equation: PE grav = mass * g * height

What is it? Electromagnetic Radiation (EM) Consists of oscillating electric and magnetic fields (forces). Light is not composed of matter. Light is energy. Light is composed of photons (small packets of energy).

The energy of a photon can also be written as: E = hc/ Duality of light The concept of the photon brings to question the nature of light. Light may act like waves rippling in space or the ocean. If so, this represents the wave-like property of light with constructive and destructive interference. Or light may act similar to a bullet and actually cause matter be relocated. This represents the particle like property of light. The latter property can be explained by the Photoelectric effect. c is the speed of light in a vacuum 3x10 8 m/s And is the wavelength

Energy can be transformed into matter with enough speed. If you use just the right wavelength on just the right material, the energy can be transferred to the matter. In some cases ejecting an electron. This is how your remote control, TV, microwave and many other devices work.

hv E - Specific metal Specific color of light

Electromagnetic Radiation the visible spectrum R O Y G B I V E R E R L N I D A L E U D O N L E E I L G O N G E E W O T

The human eye can only see the blend of colors. White light is really composed all the above wavelengths.

The first clue to understanding the role of the electron in the modern atom came from studying the line spectrum of the elements.

Bohr imagined the electron moving around the nucleus in circular orbits corresponding to various allowed energy levels. Electrons can only be in “specific or discrete” energy levels. All other values or “orbits” are not possible. These levels are said to be “quantized”. The energy of an electron can only change via a transition. They are not continuous. Bohr’s model works well for hydrogen but fails for heavier atoms.