{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chapter7tro - CHEMISTRY 161 Chapter 7 1 Structure of an...

Info icon This preview shows pages 1–24. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEMISTRY 161 Chapter 7
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
1. Structure of an Atom subatomic particles electrons protons neutrons
Image of page 2
17p 18n 17e 35 17 Cl mass number atomic number 18 neutrons e - classical physics predicts that electron falls into nucleus Why are atoms stable?
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2. Waves
Image of page 4
Intensity distance, x . . direction of propagation λ wavelength [m] amplitude v = x/t t = x/v EXP1
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Intensity time, t . . direction of propagation period [s] T T 1 = ν Frequency [s -1 ] [1 Hz = 1 s -1 ] Hertz
Image of page 6
Frequency and Wavelength λν = c wavelength frequency speed of radiation meter (m) Hz or s -1 m s -1 LONG WAVELENGTH, LOW FREQUENCY
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
light can be described as a wave
Image of page 8
James Maxwell POSTULATE visible light consist of electromagnetic waves speed of propagation (speed of light) c = 3 × 10 8 ms -1
Image of page 9

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
light has two components 1.electric field 2.magnetic field
Image of page 10
ELECTROMAGNETIC SPECTRUM λ ν INCREASING FREQUENCY & ENERGY EXP2
Image of page 11

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Which color has the higher frequency? 1 = orange 2 = blue λν = c Wavelength λ (nanometers) VISIBLE SPECTRUM
Image of page 12
The wavelength of the yellow light from a lamp is 589 nm. What is the frequency of the radiation? λν = c 7 589 5.89 10 nm m λ - = = × 1 14 7 1 8 10 09 . 5 10 89 . 5 10 998 . 2 - - - × = × × = = s m ms c λ ν
Image of page 13

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Li Na K different atoms emit distinct light EXP3 3. Postulates
Image of page 14
E h ν = Max Planck h is Planck’s constant h = 6.626 x 10 -34 J s
Image of page 15

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
energy can be emitted or absorbed only in discrete quantities (little packages) EXP4/5
Image of page 16
Emission Nebula
Image of page 17

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
E h ν = CLASSICAL any amount of energy can be emitted or absorbed NON-CLASSICAL energy can be emitted or absorbed only in discrete quantities (little packages) E n h ν = energy is not continuous QUANTUM smallest amount of energy which can be absorbed/ emitted
Image of page 18
Albert Einstein Electromagnetic radiation can be viewed as a stream of particle-like units called photons POSTULATE ν h E = 3. Properties of Photons
Image of page 19

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 20
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern