'Bright line spectrum' diaporamas de présentation

CHEMISTRY

CHEMISTRY. Part One Quantum Mechanics and Atomic Structure. Electromagnetic Radiation. Electromagnetic Radiation is radiant energy that travels in waves in both the electric and magnetic realms. What are EM Rays?. The Spectrum of light gives us the clue.

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Electrons in the Atom

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EMR info

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EMR info

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Electrons!

Electrons!. The nuclei of atoms (protons and neutrons) are NOT involved in chemical reactions, BUT ELECTRONS ARE !. The first clue that early scientists had to the existence of electrons was ATOMIC SPECTRA. ATOMIC SPECTRA.

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Flashcards for Atomic Structure II

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Atomic Structure

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The Electromagnetic Spectrum

The Electromagnetic Spectrum. By Katie Markham. Visible Light.

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Chapter 5 Notes

Chapter 5 Notes . Atomic Theory Look at the photographs on the next pages and tell me how they are all similar?. What do the photos have in common?. They all are practical applications of Atomic Emission by Excited Electrons !

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Spectroscopy : and finding out the elements of deep space objects

Spectroscopy : and finding out the elements of deep space objects. 2 astronomical purposes :. Tells us the elements that make up galaxies and stars Tells us if galaxies and stars are moving away from us or toward us. Most of what is known about stars comes from spectral studies.

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Electromagnetic Spectrum

Electromagnetic Spectrum. What is the electromagnetic spectrum?. All forms of radiant energy arranged in order by wavelength. Define Radiant Energy. Energy that travels in waves. What does a wave look like? Frequency = # of waves. This is the electromagnetic spectrum:.

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Electrons

Electrons. Negative charge e- Located in the electron cloud far from the nucleus Have mass, but it is negligible Also have wave-like properties. Bohr Model of the atom. Bohr model: e- move in fixed orbits around the nucleus. Wave-Mechanical Model of the atom.

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The Electrons can only orbit on specific orbits These orbits have specific energies

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Wavelength, Frequency, and Energy Practice Problems

Wavelength, Frequency, and Energy Practice Problems. 1. A certain violet light has a wavelength of 413 nm. What is the frequency of this light?. 2. What is the wavelength of radiation whose frequency is 1.50 x 10 13 Hz?.

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