Activity 5: The Electronic Behavior of Atoms

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Presentation transcript:

Activity 5: The Electronic Behavior of Atoms 1

What do those colors mean??? ROY G BIV 3

The nature of Light 4

The electromagnetic spectrum Wavelength decreases, frequency increases, Energy increases 5

Waves The is the_____________ distance from the crest (top) of one wave to the crest of the next. 6

The _____________ of a wave is defined as how many cycles of a wave pass through a point per second. The __________ the wavelength = the __________the frequency Short wavelength Long wavelength 7

Visible Region As you move from _______ to Violet light, the wavelength of the waves____________. An___________ the frequency of the wave and an increase in _____________ of the wave. 8

__________________ are associated with ____________. What does this mean? __________________ are associated with ____________. _______ light has the least energy, while _________ light has the most energy. 9

Dan Flavin

Bohr’s “_____________ Model” __________ are in fixed ________ levels around the ________ Energy levels get ______ together as they get ________ from the nucleus. Think of a ladder that isn’t equally spaced + 13

How did Niels Bohr arrive at this model? Flame Test Experiment 14

Bohr observed the flame colors through an instrument that ____________ the light into its component _________---just like a prism! 15

Spectroscope 16

ATOMIC EMISSION SPECTRUM When the ______ colors are observed through a spectroscope, a pattern of_______ ________ appears 17

ATOMIC EMISSION SPECTRUM The bands of light are called ______________________________________ All elements have a __________ pattern of spectral lines that can be used to _________ the _____________. This spectrum is ____________ to every _________________.

Why do we see this? ATOMIC EMISSION SPECTRUM __________ can get “excited” and move from ________energy levels to ________energy levels by ______________energy. When they ________________down to a ____________energy level the electron loses energy in the form of ___________. ATOMIC EMISSION SPECTRUM

Atomic Emission Spectrum Add energy

So… Electrons start off in the __________________________. They absorb energy and move to the _________________________. They then ________ this absorbed energy fall back down to the groundstate and _________ light!