Uploaded by Ange Zaragoza

# Light Spectrum GN

```Name:_______________________ Period:________________________ Date:_________________
Light and Electron Transitions Guided Notes
Electromagnetic Spectrum- the range of _______________________ or _____________________over
which electromagnetic radiation extends.
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___________________ is part of the EM spectrum.
Most is invisible : gamma, X-rays, UV, IR, microwaves, radio waves
Visible light: __________________that we see
Waves
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A wave causes ______________ in matter to move back and forth at ____________________ to
the direction in which the wave travels.
•
The series of __________________________forms a wave.
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High points in the wave are called ________________
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Low points are called ____________________
Wavelength
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The _________________________________ one point on a wave and the nearest point moving
with the same speed and direction is the ____________________________________
Frequency
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The _________________________of a wave is the ____________________________________
that pass by a point each second.
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The number of crest and troughs that pass each second
Electromagnetic Waves
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_______________, radio waves, and X rays are examples of_____________________________.
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They contain electric and magnetic parts that vibrate up
Electromagnetic Waves and Energy
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Higher Frequency, _____________________________
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Lower Frequency, low energy
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The more energy these waves have, the ____________________________________________as
they travel along Earth’s surface.
Electron Behavior
Electrons only exist in certain orbits (called _______________________________.)
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electrons are restricted to _______________________energy states
Increasing energy
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Fifth
Fourth
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Further from the nucleus means
_______________________
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There is no “in between” energy
Third
Second
First
Energy Levels
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The first level is called the _____________________
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The others are _________________states
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Electrons enter the excited state by _________________ energy
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Move back to ground state by________________________ energy .
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Excited states are ___________________from the nucleus
What do you think happens when an electron changes levels?
Emission spectrum- wavelengths of light given off by an element when it is excited (usu. by heat).
Every ___________________________ has a _____________emission spectrum
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A photon is _____________________ when an electron releases energy.
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Release of energy means _______________________________________(closer to nucleus)
Excited state
(E.S.) electron
light
release
Ground state
(G.S.) electron
Flame Test
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Flame test – used to ID some metals in compounds.
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Each metal gives a flame a characteristic color?
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Can identify metals based on flame colors?
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This is the last lab you will work with you group with
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You will wear googles if we have to tell you more than once you will sit and get a zero
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You will not leave your lab bench- we will come around and help
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You will read through the lab before we begin
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