Quantum_numbers_-_Review

Quantum_numbers_-_Review - Arrangement of Electrons in...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Arrangement of Electrons in Atoms The “Puzzle” of the nucleus: • Protons and electrons are attracted to each other because of opposite charges • Electrically charged particles moving in a curved path give off energy • Despite these facts, atoms don’t collapse
Background image of page 1

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

View Full DocumentRight Arrow Icon
The Development of a New Atomic Model I. Properties of Light A. Electromagnetic Radiation 1. Many types of EM waves a. visible light b. x-rays c. ultraviolet light d. infrared light e. radio waves
Background image of page 2
2. EM radiation are forms of energy which move through space as waves a. Move at speed of light (c) 3.00 x 10 8 m/s b. Speed is equal to the frequency times the wavelength c = νλ Freq ue ncy (ν) (greek letter – nu) is the number of waves passing a given point in one second Wavelength (λ) (greek letter - lambda) is the distance between peaks of adjacent waves c. Speed of light (c) is a constant, so νλ is also a constant ν (nu) and λ (lambda) must be inversely
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
B. Light and Energy - The Photoelectric Effect  The Photoelectric Effect a. Electrons are emitted from a metal when light shines on the metal Increased light intensity = more electrons ejected Higher frequency light = faster electrons being ejected
Background image of page 5

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

View Full DocumentRight Arrow Icon
2. Radiant energy is transferred in units (or quanta) of energy called photons a. A photon is a particle of energy having a rest mass of zero and carrying a quantum of energy b. A quantum is the minimum amount of energy that can be lost or gained by an atom
Background image of page 6
3. Radiant Energy (E) of a photon is directly proportional to the frequency (ν) of radiation a. E = hν (h is Planck’s constant, 6.62554 x 10 - 34 J sec) gamma X-ray UV Visible light infrared microwaves FM short AM radiowaves VIBGYOR Wavelength increases Frequency decreases Energy decreases 10 -9 10 -8 10 -6 10 -5 10 -2 10 -1 Wavelength 10 17 10 15 10 14 10 12 10 10 10 9 frequency
Background image of page 7

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

View Full DocumentRight Arrow Icon
4. Wave-Particle Duality a. Energy travels through space as waves, but can be thought of as a stream of particles (Einstein)
Background image of page 8
II. The Hydrogen Line Spectrum A. Ground State 1. The lowest energy state of an atom B. Excited State 1. A state in which an atom has a higher
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/06/2011 for the course SCH 4U taught by Professor White during the Spring '10 term at Beacon FL.

Page1 / 30

Quantum_numbers_-_Review - Arrangement of Electrons in...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online